Sahih al-Bukhari 1132.2

Prayer at Night (Tahajjud)

#1132.2Book 19

حَدَّثَنَا مُحَمَّدُ بْنُ سَلاَمٍ قَالَ أَخْبَرَنَا أَبُو الأَحْوَصِ عَنِ الأَشْعَثِ قَالَ إِذَا سَمِعَ الصَّارِخَ قَامَ فَصَلَّى‏

Narrated Al-Ashath:He (the Prophet (ﷺ) ) used to get up for the prayer on hearing the crowing of a cock

Reference
Sahih al-Bukhari 1132.2
In-book
Book 19, Hadith 13
English
Muhsin Khan