´It was narrated that Aishah said:` "When the Muaddhin fell silent after the Adhan for the beginning of Fajr, he would pray two brief rak'ahs, then he would lie down on his right side."
Hadith Referenceسنن نسائي / كتاب قيام الليل وتطوع النهار / 1763
Hadith Gradingالألبانی:صحيح | زبیر علی زئی:متفق عليه