Caution: Translations of Quran and Ḥadīth may lead to possible misapplications and misinterpretations. This site is intended for students of sacred knowledge that are proficient in comprehending classical Arabic and have a strong foundation in Islamic sciences. Also note that religious injunctions rely on several aspects beyond what one may glean through reading individual aḥādīth.
tirmidhi:3575ʿAbd b. Ḥumayd > Muḥammad b. Ismāʿīl b. Abū Fudayk > Ibn Abū Dhiʾb > Abū Saʿīd al-Barrād > Muʿādh b. ʿAbdullāh b. Khubayb from his father

“We went out on a rainy and extremely dark night, looking for the Messenger of Allah ﷺ, so that he could lead us in Salat.” He said: “So I met him and he ﷺ said: ‘Speak’ but I did not say anything. Then he ﷺ said: ‘Speak.’ But I did not say anything. He ﷺ said: ‘Speak.’ So I said: ‘What should I say?’ He ﷺ said: ‘Say: “Say: He is Allah, the One” and Al-Muʿawwidhatain, when you reach evening, and when you reach morning, three times, they will suffice you against everything.’”  

الترمذي:٣٥٧٥حَدَّثَنَا عَبْدُ بْنُ حُمَيْدٍ حَدَّثَنَا مُحَمَّدُ بْنُ إِسْمَاعِيلَ بْنِ أَبِي فُدَيْكٍ حَدَّثَنَا ابْنُ أَبِي ذِئْبٍ عَنْ أَبِي سَعِيدٍ الْبَرَّادِ عَنْ مُعَاذِ بْنِ عَبْدِ اللَّهِ بْنِ خُبَيْبٍ عَنْ أَبِيهِ قَالَ

خَرَجْنَا فِي لَيْلَةٍ مَطِيرَةٍ وَظُلْمَةٍ شَدِيدَةٍ نَطْلُبُ رَسُولَ اللَّهِ ﷺ يُصَلِّي لَنَا قَالَ فَأَدْرَكْتُهُ فَقَالَ قُلْ فَلَمْ أَقُلْ شَيْئًا ثُمَّ قَالَ قُلْ فَلَمْ أَقُلْ شَيْئًا قَالَ قُلْ قُلْتُ مَا أَقُولُ قَالَ قُلْ ( هوَ اللَّهُ أَحَدٌ ) وَالْمُعَوِّذَتَيْنِ حِينَ تُمْسِي وَتُصْبِحُ ثَلاَثَ مَرَّاتٍ تَكْفِيكَ مِنْ كُلِّ شَيْءٍ  

قَالَ أَبُو عِيسَى وَهَذَا حَدِيثٌ حَسَنٌ صَحِيحٌ غَرِيبٌ مِنْ هَذَا الْوَجْهِ وَأَبُو سَعِيدٍ الْبَرَّادُ هُوَ أَسِيدُ بْنُ أَبِي أَسِيدٍ مَدَنِيٌّ

See similar narrations below:

Collected by Abū Dāwūd, Aḥmad
abudawud:5082Muḥammad b. al-Muṣaffá > Ibn Abū Fudayk > Ibn Abū Dhiʾb > Abū Asīd al-Barrād > Muʿādh b. ʿAbdullāh b. Khubayb from his father

We went out one rainy and intensely dark night to look for the Messenger of Allah ﷺ to lead us in prayer, and when we found him, he asked: Have you prayed?, but I did not say anything. So he said: Say, but I did not say anything. He again said: Say, but I did not say anything. He then said: Say. So I said: What am I to say? He said: Say: "Say, He is Allah, One," and al-Mu'awwadhatan three times in the morning and evening; they will serve you for every purpose.  

أبو داود:٥٠٨٢حَدَّثَنَا مُحَمَّدُ بْنُ الْمُصَفَّى حَدَّثَنَا ابْنُ أَبِي فُدَيْكٍ قَالَ أَخْبَرَنِي ابْنُ أَبِي ذِئْبٍ عَنْ أَبِي أَسِيدٍ الْبَرَّادِ عَنْ مُعَاذِ بْنِ عَبْدِ اللَّهِ بْنِ خُبَيْبٍ عَنْ أَبِيهِ

أَنَّهُ قَالَ خَرَجْنَا فِي لَيْلَةِ مَطَرٍ وَظُلْمَةٍ شَدِيدَةٍ نَطْلُبُ رَسُولَ اللَّهِ ﷺ لِيُصَلِّيَ لَنَا فَأَدْرَكْنَاهُ فَقَالَ أَصَلَّيْتُمْ فَلَمْ أَقُلْ شَيْئًا فَقَالَ قُلْ فَلَمْ أَقُلْ شَيْئًا ثُمَّ قَالَ قُلْ فَلَمْ أَقُلْ شَيْئًا ثُمَّ قَالَ قُلْ فَقُلْتُ يَا رَسُولَ اللَّهِ مَا أَقُولُ قَالَ { قُلْ هُوَ اللَّهُ أَحَدٌ } وَالْمُعَوِّذَتَيْنِ حِينَ تُمْسِي وَحِينَ تُصْبِحُ ثَلاَثَ مَرَّاتٍ تَكْفِيكَ مِنْ كُلِّ شَىْءٍ  

ahmad:22664ʿAbdullāh > Muḥammad b. Abū Bakr al-Muqaddamī > al-Ḍaḥḥāk b. Makhlad > Ibn Abū Dhiʾb > Asīd b. Abū Asīd > Muʿādh b. ʿAbdullāh b. Khubayb from his father

"It was raining and dark, and we were waiting for the Messenger of Allah [SAW] to lead us in prayer. Then the Messenger of Allah [SAW] came out to lead us in prayer and he said: 'Say.' I said: 'What should I say?' He said: 'Say: He is Allah, (the) One and Al-Mu'awwadhatain in the evening and in the morning, three times, and that will suffice you against everything.'" (Using translation from Nasāʾī 5428)   

أحمد:٢٢٦٦٤حَدَّثَنَا عَبْدُ اللهِ حَدَّثَنِي مُحَمَّدُ بْنُ أَبِي بَكْرٍ الْمُقَدَّمِيُّ حَدَّثَنَا الضَّحَّاكُ بْنُ مَخْلَدٍ حَدَّثَنَا ابْنُ أَبِي ذِئْبٍ عَنْ أَسِيدِ بْنِ أَبِي أَسِيدٍ عَنْ مُعَاذِ بْنِ عَبْدِ اللهِ بْنِ خُبَيْبٍ عَنْ أَبِيهِ قَالَ

أَصَابَنَا طَشٌّ وَظُلْمَةٌ فَانْتَظَرْنَا رَسُولَ اللهِ ﷺ لِيُصَلِّيَ لَنَا فَخَرَجَ فَأَخَذَ بِيَدِي فَقَالَ قُلْ فَسَكَتُّ قَالَ قُلْ قُلْتُ مَا أَقُولُ؟ قَالَ قُلْ هُوَ اللهُ أَحَدٌ وَالْمُعَوِّذَتَيْنِ حِينَ تُمْسِي وَحِينَ تُصْبِحُ ثَلَاثًا تَكْفِيكَ كُلَّ يَوْمٍ مَرَّتَيْنِ