From Sahih Bukhari (Hadith 737):
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: Bukhari 737