"I entered upon 'Ikrimah on the day concerning which there was doubt as to whether it was Ramadan or Shaban, and he was eating bread, vegetables and milk. He said: 'Come and eat.' I said: 'I am fasting.' He adjured me by Allah to break my fast. I said Subhan-Allah twice. When I saw that he was insisting, I went forward and said: 'Give me what you have.' He said: 'I heard Ibn 'Abbas say: The Messenger of Allah said: 'Fast when you see it (the crescent) and stop fasting when you see it, and if clouds or darkness prevent you from seeing it, then complete the number of days of Shaban, and do not fast ahead of the month, and do not join Ramadan to a day of Shaban." '  

دَخَلْتُ عَلَى عِكْرِمَةَ فِي يَوْمٍ قَدْ أُشْكِلَ مِنْ رَمَضَانَ هُوَ أَمْ مِنْ شَعْبَانَ وَهُوَ يَأْكُلُ خُبْزًا وَبَقْلاً وَلَبَنًا فَقَالَ لِي هَلُمَّ فَقُلْتُ إِنِّي صَائِمٌ قَالَ وَحَلَفَ بِاللَّهِ لَتُفْطِرَنَّ قُلْتُ سُبْحَانَ اللَّهِ مَرَّتَيْنِ فَلَمَّا رَأَيْتُهُ يَحْلِفُ لاَ يَسْتَثْنِي تَقَدَّمْتُ قُلْتُ هَاتِ الآنَ مَا عِنْدَكَ قَالَ سَمِعْتُ ابْنَ عَبَّاسٍ يَقُولُ قَالَ رَسُولُ اللَّهِ ﷺ صُومُوا لِرُؤْيَتِهِ وَأَفْطِرُوا لِرُؤْيَتِهِ فَإِنْ حَالَ بَيْنَكُمْ وَبَيْنَهُ سَحَابَةٌ أَوْ ظُلْمَةٌ فَأَكْمِلُوا الْعِدَّةَ عِدَّةَ شَعْبَانَ وَلاَ تَسْتَقْبِلُوا الشَّهْرَ اسْتِقْبَالاً وَلاَ تَصِلُوا رَمَضَانَ بِيَوْمٍ مِنْ شَعْبَانَ  

"I entered upon 'Ikrimah on the day concerning which there was doubt as to whether it was Ramadan or Shaban, and he was eating bread, vegetables and milk. He said: 'Come and eat.' I said: 'I am fasting.' He adjured me by Allah to break my fast. I said Subhan-Allah twice. When I saw that he was insisting, I went forward and said: 'Give me what you have.' He said: 'I heard Ibn 'Abbas say: The Messenger of Allah said: 'Fast when you see it (the crescent) and stop fasting when you see it, and if clouds or darkness prevent you from seeing it, then complete the number of days of Shaban, and do not fast ahead of the month, and do not join Ramadan to a day of Shaban." ' (Using translation from Nasāʾī 2189)   

أَصْبَحْتُ فِي يَوْمٍ قَدْ أُشْكِلَ عَلَيَّ مِنْ شَعْبَانَ أَوْ مِنْ شَهْرِ رَمَضَانَ فَأَصْبَحْتُ صَائِمًا فَأَتَيْتُ عِكْرِمَةَ فَإِذَا هُوَ يَأْكُلُ خُبْزًا وَبَقْلًا فَقَالَ هَلُمَّ إِلَى الْغَدَاءِ فَقُلْتُ إِنِّي صَائِمٌ فَقَالَ أُقْسِمُ بِاللَّهِ لَتُفْطِرَنَّ فَلَمَّا رَأَيْتُهُ حَلَفَ وَلَا يَسْتَثْنِي تَقَدَّمْتُ فَعَذَّرْتُ وَإِنَّمَا تَسَحَّرْتُ قُبَيْلَ ذَلِكَ ثُمَّ قُلْتُ هَاتِ الْآنَ مَا عِنْدَكَ فَقَالَ حَدَّثَنَا ابْنُ عَبَّاسٍ قَالَ قَالَ رَسُولُ اللَّهِ ﷺ «صُومُوا لِرُؤْيَتِهِ وَأَفْطِرُوا لِرُؤْيَتِهِ فَإِنْ حَالَ بَيْنَكُمْ وَبَيْنَهُ سَحَابٌ فَكَمِّلُوا الْعِدَّةَ ثَلَاثِينَ وَلَا تَسْتَقْبِلُوا الشَّهْرَ اسْتِقْبَالًا»  

[Machine] I entered upon Ikrimah one day, and he questioned me about whether it was the 29th day of Ramadan or the 29th day of Sha'ban. I became confused and decided to fast, saying that if it was Ramadan, I would not be left behind, and if it was Sha'ban, it would be voluntary fasting. So, I entered upon Ikrimah while he was eating bread, vegetables, and yogurt. He invited me to join him for a meal, but I informed him that I was fasting. He insisted, swearing by Allah that he would make me break my fast. I said, "Glory be to Allah." He then insisted again, swearing by Allah that he would make me break my fast. And when I saw that he did not make any exceptions, I broke my fast. I had some food and felt full. Then I said, "Give me more food." He said, "I heard Ibn Abbas say that he heard the Messenger of Allah ﷺ say, 'Fast when you see the new moon and break your fast when you see it. But if it is cloudy or the moon is not visible to you, then complete the month of Sha'ban and do not start Ramadan until you see the new moon.'"  

دَخَلْتُ عَلَى عِكْرِمَةَ فِي يَوْمٍ وَقَدْ أُشْكِلَ عَلَيَّ أَمِنْ رَمَضَانَ هُوَ أَمْ مِنْ شَعْبَانَ فَأَصْبَحْتُ صَائِمًا فَقُلْتُ إِنْ كَانَ مِنْ رَمَضَانَ لَمْ يَسْبِقْنِي وَإِنْ كَانَ مِنْ شَعْبَانَ كَانَ تَطَوُّعًا فَدَخَلْتُ عَلَى عِكْرِمَةَ وَهُوَ يَأْكُلُ خُبْزًا وَبَقْلًا وَلَبَنًا فَقَالَ هَلُمَّ إِلَى الْغَدَاءِ قُلْتُ إِنِّي صَائِمٌ فَقَالَ أَحْلِفُ بِاللهِ لَتُفْطِرَنَّهُ قُلْتُ سُبْحَانَ اللهِ قَالَ أَحْلِفُ بِاللهِ لَتُفْطِرَنَّهُ فَلَمَّا رَأَيْتُهُ لَا يَسْتَثْنِي أَفْطَرْتُ فَغَدَوْتُ بِبَعْضِ الشَّيْءِ وَأَنَا شَبْعَانٌ ثُمَّ قُلْتُ هَاتِ فَقَالَ سَمِعْتُ ابْنَ عَبَّاسٍ يَقُولُ سَمِعْتُ رَسُولَ اللهِ ﷺ يَقُولُ صُومُوا لِرُؤْيَتِهِ وَأَفْطِرُوا لِرُؤْيَتِهِ فَإِنْ حَالَتْ بَيْنَكُمْ وَبَيْنَهُ سَحَابَةٌ أَوْ غَيَابَةٌ فَأَكْمِلُوا الْعِدَّةَ وَلَا تَسْتَقْبِلُوا الشَّهْرَ اسْتِقْبَالًا لَا تَسْتَقْبِلُوا رَمَضَانَ بِيَوْمٍ مِنْ شَعْبَانَ