(84) باب رَفْعِ الْيَدَيْنِ إِذَا كَبَّرَ وَإِذَا رَكَعَ وَإِذَا رَفَعَ
Narrated Abu Qilaba:
I saw Malik bin Huwairith saying Takbir and raising both his hands (on starting the prayers and raising his hands on bowing and also on raising his head after bowing. Malik bin Huwairith said, "Allah's Messenger (ﷺ) did the same."
Reference: Sahih al-Bukhari 737
In-book reference: Book 10, Hadith 131
USC-MSA web (English) reference(deprecated numbering scheme): Vol. 1, Book 12, Hadith 704