question #1 Sahih al-Bukhari 737, Book 10, Hadith 131 : What is the significance of raising hands during different positions in prayer?

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.”