A young Jewish boy used to serve the Prophet ﷺ and he became sick. So the Prophet ﷺ went to visit him. He sat near his head and asked him to embrace Islam. The boy looked at his father, who was sitting there; the latter told him to obey Abul-Qasim and the boy embraced Islam. The Prophet ﷺ came out saying: "Praises be to Allah Who saved the boy from the Hell-fire." (Using translation from Bukhārī 1356)   

أَنَّ غُلَامًا مِنَ الْيَهُودِ كَانَ يَخْدُمُ النَّبِيَّ ﷺ فَمَرِضَ فَأَتَاهُ النَّبِيُّ ﷺ يَعُودُهُ فَقَعَدَ رَسُولُ اللهِ ﷺ عِنْدَ رَأْسِهِ فَنَظَرَ الْغُلَامُ إِلَى أَبِيهِ فَقَالَ أَطِعْ أَبَا الْقَاسِمِ فَأَسْلَمَ فَخَرَجَ رَسُولُ اللهِ ﷺ وَهُوَ يَقُولُ الْحَمْدُ لِلَّهِ الَّذِي أَنْقَذَهُ بِي مِنَ النَّارِ  

[Machine] I heard Zaid ibn Arqam say that the first person to pray with the Prophet ﷺ was Ali ibn Abi Talib. I mentioned this to Ibrahim, and he denied it and said, "It was Abu Bakr."  

سَمِعْتُ زَيْدَ بْنَ أَرْقَمَ يَقُولُ أَوَّلُ مَنْ صَلَّى مَعَ النَّبِيِّ ﷺ عَلِيُّ بْنُ أَبِي طَالِبٍ قَالَ فَذَكَرْتُ ذَلِكَ لِإِبْرَاهِيمَ فَأَنْكَرَ ذَلِكَ وَقَالَ أَبُو بَكْرٍ  

[Machine] That it has not reached us with a supporting chain of transmission that is used as evidence like it, and the people of knowledge differ about its authenticity on the day he embraced Islam.  

أَنَّهُ لَمْ يَقَعْ إِلَيْنَا بِإِسْنَادٍ يُحْتَجُّ بِمِثْلِهِ وَاخْتَلَفَ أَهْلُ الْعِلْمِ فِي سِنِّهِ يَوْمَ أَسْلَمَ  

[Machine] Ali embraced Islam when he was eight years old.  

أَسْلَمَ عَلِيٌّ ؓ وَهُوَ ابْنُ ثَمَانِ سِنِينَ  

[Machine] That Ali ibn Abi Talib embraced Islam when he was ten years old.  

أَنَّ عَلِيَّ بْنَ أَبِي طَالِبٍ ؓ أَسْلَمَ وَهُوَ ابْنُ عَشْرِ سِنِينَ  

[Machine] Ali ibn Abi Talib embraced Islam at the age of ten.  

أَسْلَمَ عَلِيُّ بْنُ أَبِي طَالِبٍ ؓ وَهُوَ ابْنُ عَشْرِ سِنِينَ  

[Machine] I heard a partner saying, "Ali embraced Islam when he was eleven years old."  

سَمِعْتُ شَرِيكًا يَقُولُ أَسْلَمَ عَلِيٌّ وَهُوَ ابْنُ إِحْدَى عَشْرَةَ سَنَةً  

[Machine] Ali embraced Islam after Khadijah, when he was fifteen or sixteen years old.  

مَنْ أَسْلَمَ عَلِيٌّ بَعْدَ خَدِيجَةَ ؓ وَهُوَ ابْنُ خَمْسَ عَشْرَةَ سَنَةً أَوْ سِتَّ عَشْرَةَ سَنَةً  

[Machine] The Messenger of Allah ﷺ entrusted the flag to Ali on the day of Badr, when he was twenty years old. Imam Ahmed said, "The battle of Badr took place a year and a half after the Prophet ﷺ arrived in Medina. There is disagreement about Ali's age when he received the flag. Some say he was ten, others say thirteen, and some say fifteen. If he was ten, and it is confirmed that Ali was twenty years old on the day of Badr, it means he returned to Mecca when he was only a little older than that." Urwah ibn Al-Zubair said, "If he was thirteen or fifteen, then he would have been younger than that." Allah knows best. There is also disagreement about Ali's age when he was killed. Some say he was sixty-five, others say he was sixty-three, and some say he was younger than that. The most famous opinion is that he was sixty-three, with him being forty years old when the Prophet ﷺ migrated to Medina. His age when he embraced Islam was influenced by the opinion of those who said that the Prophet ﷺ stayed in Mecca for ten to thirteen years before migrating, and by the opinion of those who said that the migration was earlier, from thirteen to fifteen years before. Some said that Ali's age when he prayed with the Prophet ﷺ was an age at which puberty could possibly occur. The poetry that has been narrated is open to interpretation, and its chain of narrators is weak. The ruling on the authenticity of the statement of an adult over that of a distinguishing child is controversial. Ali's ruling of embracing Islam was influenced either because he had remained until the description of Islam was offered after he reached puberty, or because the Prophet ﷺ had specifically called him to Islam, unlike other children who were not addressed. Or it could be because the ruling of a distinguishing child at that time was decided before the arrival of the Islamic law. It could also have been because he had reached puberty through a wet dream, and he became an adult by it. Allah knows best. Al-Hasan Al-Basri and others have narrated from Qatadah that Ali embraced Islam at the age of fifteen or sixteen, as mentioned before.  

أَنَّ رَسُولَ اللهِ ﷺ دَفَعَ الرَّايَةَ إِلَى عَلِيٍّ يَوْمَ بَدْرٍ وَهُوَ ابْنُ عِشْرِينَ سَنَةً قَالَ الْإِمَامُ أَحْمَدُ رَحِمَهُ اللهُ وَوَقْعَةُ بَدْرٍ كَانَتْ بَعْدَمَا قَدِمَ رَسُولُ اللهِ ﷺ الْمَدِينَةَ بِسَنَةٍ وَنِصْفِ سَنَةٍ وَاخْتَلَفُوا فِي قَدْرِ مُقَامِهِ بِمَكَّةَ بَعْدَمَا بُعِثَ فَقِيلَ عَشْرًا وَقِيلَ ثَلَاثَ عَشْرَةَ سَنَةً وَقِيلَ خَمْسَ عَشْرَةَ سَنَةً فَإِنْ كَانَ عَشْرًا وَصَحَّ أَنَّ عَلِيًّا كَانَ ابْنَ عِشْرِينَ سَنَةً يَوْمَ بَدْرٍ رَجَعَ سِنُّهُ يَوْمَ أَسْلَمَ إِلَى قَرِيبٍ مِمَّا قَالَ عُرْوَةُ بْنُ الزُّبَيْرِ وَإِنْ كَانَ ثَلَاثَ عَشْرَةَ أَوْ خَمْسَ عَشْرَةَ فَإِلَى أَقَلَّ مِنْ ذَلِكَ وَاللهُ أَعْلَمُ وَاخْتَلَفُوا فِي سِنِّ عَلِيٍّ ؓ يَوْمَ قُتِلَ فَقِيلَ خَمْسٌ وَسِتُّونَ سَنَةً وَقِيلَ ثَلَاثٌ وَسِتُّونَ وَقِيلَ أَقَلُّ مِنْ ذَلِكَ وَأَشْهَرُهُ ثَلَاثٌ وَسِتُّونَ عَلَى رَأْسِ أَرْبَعِينَ مِنْ مُهَاجَرِ رَسُولِ اللهِ ﷺ فَيَرْجِعُ سِنُّهُ يَوْمَ أَسْلَمَ عَلَى قَوْلِ مَنْ قَالَ مَكَثَ رَسُولُ اللهِ ﷺ بِمَكَّةَ عَشْرًا إِلَى ثَلَاثَ عَشْرَةَ سَنَةً وَعَلَى قَوْلِ مَنْ قَالَ ثَلَاثَ عَشْرَةَ إِلَى عَشْرِ سِنِينَ فَفِي أَكْثَرِ الرِّوَايَاتِ كَانَ ؓ بَلَغَ مِنَ السِّنِّ حِينَ صَلَّى مَعَ النَّبِيِّ ﷺ قَدْرًا يَحْتَمِلُ أَنْ يَكُونَ احْتَلَمَ فِيهِ وَمَا رُوِيَ مِنَ الشِّعْرِ مُحْتَمِلٌ لِلتَّأْوِيلِ مَعَ ضَعْفِ إِسْنَادِهِ عَلَى أَنَّ الْحُكْمَ بِصِحَّةِ قَوْلِ الْبِالِغِ دُونَ الصَّبِيِّ الْمُمَيِّزِ وَقَعَ شِرْعَةً بَعْدَ إِسْلَامِ عَلِيٍّ ؓ فَإِسْلَامُهُ كَانَ مَحْكُومًا بِصِحَّتِهِ إِمَّا لِأَنَّهُ بَقِيَ حَتَّى وَصَفَ الْإِسْلَامَ بَعْدَ بُلُوِغِهِ أَوْ لِأَنَّ النَّبِيَّ ﷺ خَاطَبَهُ بِالدُّعَاءِ إِلَى الْإِسْلَامِ وَغَيْرُهُ مِنَ الصِّبْيَانِ غَيْرُ مُخَاطَبٍ أَوْ لِأَنَّ قَوْلَ الصَّبِيِّ الْمُمَيِّزِ إِذْ ذَاكَ كَانَ مَحْكُومًا بِصِحَّتِهِ قَبْلَ وُرُودِ الشَّرْعِ بِغَيْرِهِ أَوْ كَانَ قَدِ احْتَلَمَ فَصَارَ بَالِغًا بِهِ وَاللهُ أَعْلَمُ هَذَا وَقَدْ ذَهَبَ الْحَسَنُ الْبَصْرِيُّ وَغَيْرُ وَاحِدٍ فِي رِوَايَةِ قَتَادَةَ إِلَى أَنَّ عَلِيًّا ؓ أَسْلَمَ وَهُوَ ابْنُ خَمْسَ عَشْرَةَ سَنَةً أَوْ سِتَّ عَشْرَةَ سَنَةً كَمَا مَضَى ذِكْرُهُ  

[Machine] The Messenger of Allah, ﷺ , stayed in Mecca for fifteen years: he could hear the voice and see the light for seven years, and for eight years he did not see anything but received revelations. He stayed in Medina for ten years, or according to the narration of Hajjaj ibn Minhal, seven years: he could see the light and hear the voice, and for eight years he received revelations.  

أَقَامَ رَسُولُ اللهِ ﷺ بِمَكَّةَ خَمْسَ عَشْرَةَ سَنَةً يَسْمَعُ الصَّوْتَ وَيَرَى الضَّوْءَ سَبْعَ سِنِينَ وَلَا يَرَى شَيْئًا وَثَمَانِ سِنِينَ يُوحَى إِلَيْهِ وَأَقَامَ بِالْمَدِينَةِ عَشْرًا وَفِي رِوَايَةِ حَجَّاجِ بْنِ مِنْهَالٍ سَبْعًا يَرَى الضَّوْءَ وَيَسْمَعُ الصَّوْتَ وَثَمَانِيًا يُوحَى إِلَيْهِ وَأَقَامَ بِالْمَدِينَةِ عَشْرًا  

[Machine] The Prophet ﷺ stayed in Mecca for ten years, during which the Quran was revealed to him, and in Medina for ten years, during which the Quran was also revealed to him.  

النَّبِيَّ ﷺ لَبِثَ بِمَكَّةَ عَشْرَ سِنِينَ يَنْزِلُ عَلَيْهِ الْقُرْآنُ وَبِالْمَدِينَةِ عَشْرَ سِنِينَ يَنْزِلُ عَلَيْهِ  

[Machine] The Messenger of Allah ﷺ resided in Mecca for thirteen years and in Medina for ten years, and he passed away at the age of sixty-three.  

أَقَامَ رَسُولُ اللهِ ﷺ بِمَكَّةَ ثَلَاثَ عَشْرَةَ سَنَةً وَبِالْمَدِينَةِ عَشْرًا وَمَاتَ وَهُوَ ابْنُ ثَلَاثٍ وَسِتِّينَ  

[Machine] The Messenger of Allah ﷺ stayed in Makkah for thirteen years and passed away when he was sixty-three years old.  

مَكَثَ رَسُولُ اللهِ ﷺ بِمَكَّةَ ثَلَاثَ عَشْرَةَ سَنَةً وَتُوُفِّيَ وَهُوَ ابْنُ ثَلَاثٍ وَسِتِّينَ  

[Machine] The Messenger of Allah ﷺ was sent when he was forty years old, and he stayed in Makkah for thirteen years, during which revelation came to him. Then he was commanded to migrate, so he migrated for ten years, and he passed away when he was sixty-three years old.  

بُعِثَ رَسُولُ اللهِ ﷺ وَهُوَ لِأَرْبَعِينَ سَنَةً فَمَكَثَ بِمَكَّةَ ثَلَاثَ عَشْرَةَ يُوحَى إِلَيْهِ ثُمَّ أُمِرَ بِالْهِجْرَةِ فَهَاجَرَ عَشْرَ سِنِينَ وَمَاتَ وَهُوَ ابْنُ ثَلَاثٍ وَسِتِّينَ  

[Machine] About a battle that the Messenger of Allah ﷺ fought in, and he was killed while he was sixty-two years old.  

عَنْ غَزْوَةٍ غَزَاهَا رَسُولُ اللهِ ﷺ قَطُّ وَقُتِلَ وَهُوَ ابْنُ بِضْعٍ وَسِتِّينَ سَنَةً