over his left and place them upon his chest. This is the Sunnah narrated from the Prophet ﷺ and it is the better and more complete way. If he lets his hands hang and does not clasp them, there is no sin, for he has merely left a Sunnah, not an obligation. Thus both letting the hands drop and clasping them are permissible, but clasping them and placing them on the chest is preferable and more perfect because it is authentically reported from the Prophet ﷺ.
***
Raising the hands in the prayer

Question: Should the worshipper raise his hands at the Takbirs that accompany the movements in the prayer? If not at all of them, at which ones should the hands be raised—for example, when rising from bowing or when going into prostration?

Answer: Yes. What is authentically established is that the hands are raised with three Takbirs during the prayer: at the opening Takbir, at the Takbir for bowing, and when rising from bowing. Some scholars add a fourth occasion—when standing up after the first tashahhud. These are the points in the prayer at which the hands are raised while pronouncing the Takbir. In all other positions the hands are not raised.
***
Placing the hands on the chest after rising from bowing

Question: Is placing the right hand over the left hand after rising from bowing part of the Sunnah, or is it a blameworthy innovation?