The prayers of the Prophet salla Allahu alaihi wa sallam was described to us by the companions who saw him. They told us that we should put our hands over the chest and to raise the hands when bowing and raising our heads from the bowing position.
If you do this, you are rewarded. If you don’t, your prayer is correct but less in reward.
Kindly refer to the following links:
https://www.youtube.com/watch?
https://www.youtube.com/watch?