بُلُوغُ الْمَرَامِ
Bulugh al-Maram 503
The Book of Prayer
وَلِلْبُخَارِيِّ مِنْ حَدِيثِ أَبِي بَكْرَةَ - رضى الله عنه - { فَصَلُّوا وَادْعُوا حَتَّى يُكْشَفَ مَا بِكُمْ } [1] .
al-Bukhari's narration from Abu Bakrah (RA) has: Pray and supplicate (to Allah) till (the eclipse) is over."
Sunnah.com reference: Book 2, Hadith 432