(31) باب الدُّعَاءِ لِلصِّبْيَانِ بِالْبَرَكَةِ وَمَسْحِ رُءُوسِهِمْ
Narrated `Abdullah bin Tha`laba bin Su'air:
whose eye Allah's Messenger (ﷺ) had touched, that he had seen Sa`d bin Abi Waqqas offering one rak`a only for the witr prayer.
Reference: Sahih al-Bukhari 6356
In-book reference: Book 80, Hadith 53
USC-MSA web (English) reference(deprecated numbering scheme): Vol. 8, Book 75, Hadith 367