عَنْ أَبِي هُرَيْرَةَ رَضِيَ اللَّهُ عَنْهُ أَنَّ رَسُولَ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَآلِهِ وَسَلَّمَ قَالَ: ((لَا تَدْعُوا رَكْعَتَيِ الْفَجْرِ وَإِنْ طَرَدَتْكُمُ الْخَيْلُ))
It is narrated from Sayyiduna Abu Hurairah, may Allah be pleased with him, that the Messenger of Allah, peace and blessings be upon him, said: Do not abandon the two Sunnah (units) of Fajr under any circumstances, even if a group of (enemy) horsemen is pursuing you.