Sahih Muslim
Sahih Muslim 382
وَحَدَّثَنِي زُهَيْرُ بْنُ حَرْبٍ، حَدَّثَنَا يَحْيَى، - يَعْنِي ابْنَ سَعِيدٍ - عَنْ حَمَّادِ بْنِ سَلَمَةَ، حَدَّثَنَا ثَابِتٌ، عَنْ أَنَسِ بْنِ مَالِكٍ، قَالَ كَانَ رَسُولُ اللَّهِ صلى الله عليه وسلم يُغِيرُ إِذَا طَلَعَ الْفَجْرُ وَكَانَ يَسْتَمِعُ الأَذَانَ فَإِنْ سَمِعَ أَذَانًا أَمْسَكَ وَإِلاَّ أَغَارَ فَسَمِعَ رَجُلاً يَقُولُ اللَّهُ أَكْبَرُ اللَّهُ أَكْبَرُ . فَقَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم " عَلَى الْفِطْرَةِ " . ثُمَّ قَالَ أَشْهَدُ أَنْ لاَ إِلَهَ إِلاَّ اللَّهُ أَشْهَدُ أَنْ لاَ إِلَهَ إِلاَّ اللَّهُ . فَقَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم " خَرَجْتَ مِنَ النَّارِ " . فَنَظَرُوا فَإِذَا هُوَ رَاعِي مِعْزًى .
Anas ibn Malik reported that when dawn broke, the Messenger of Allah ﷺ would launch a raid after listening for the call to prayer. If he heard a call, he held back; otherwise, he would proceed. He heard a man say Allahu Akbar, Allahu Akbar, and said: That is the natural way. Then the man said: I bear witness that there is no god but Allah, I bear witness that there is no god but Allah. The Messenger of Allah ﷺ said: You have been saved from the Fire. They looked and found that the man was a goatherd.