عَنْ أَبِي هُرَيْرَةَ رَضِيَ اللَّهُ عَنْهُ سَمِعَ النَّبِيُّ صَلَّى اللَّهُ عَلَيْهِ وَآلِهِ وَسَلَّمَ صَوْتَ صَبِيٍّ فِي الصَّلَاةِ فَخَفَّفَ الصَّلَاةَ
It is narrated from Sayyiduna Abu Hurairah (may Allah be pleased with him) that (one day) the Noble Prophet (peace and blessings be upon him) heard the sound of a child (crying) during the prayer, so he shortened the prayer because of this.