عَنْ مُعَاذِ بْنِ عَبْدِ اللَّهِ بْنِ خُبَيْبٍ عَنْ أَبِيهِ رَضِيَ اللَّهُ عَنْهُ قَالَ أَصَابَنَا عَطَشٌ وَظُلْمَةٌ فَانْتَظَرْنَا رَسُولَ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَآلِهِ وَسَلَّمَ لِيُصَلِّيَ لَنَا فَخَرَجَ فَأَخَذَ بِيَدِي فَقَالَ قُلْ فَسَكَتُّ قَالَ قُلْ قُلْتُ مَا أَقُولُ قَالَ {قُلْ هُوَ اللَّهُ أَحَدٌ} [الإخلاص: 1] وَالْمُعَوِّذَتَيْنِ حِينَ تُمْسِي وَحِينَ تُصْبِحُ ثَلَاثًا تَكْفِيكَ كُلَّ يَوْمٍ مَرَّتَيْنِ
It is narrated from Sayyiduna Abdullah bin Khubaib, he says: We were extremely thirsty, and it was dark, and we were waiting for the Noble Prophet (peace and blessings be upon him) so that he (peace and blessings be upon him) would come and lead us in prayer. Then he (peace and blessings be upon him) arrived and took hold of my hand and said: Say. I remained silent. He (peace and blessings be upon him) again said: Say. I asked: O Messenger of Allah, what should I say? He (peace and blessings be upon him) said: When you reach the evening and the morning, recite Surah Ikhlas, Surah Falaq, and Surah Nas three times each; they will suffice you every day, twice.