´It was narrated from Ibn 'Umar in a Marfu' report that:` The hands prostrate as the face prostrates, so when one of you puts his face down he should put his hands down, and when he raises (the face) he should raise (the hands) too.
Explanation & Benefits
Hafiz Muhammad Ameen
1093. Commentary: The purpose here is that it is not sufficient in prostration (sujud) to place only the face on the ground; rather, both hands should also be placed on the ground around the face so that they too participate in the prostration. The next narration provides further clarification of this.
Source: Sunan Nasa'i: Translation and Benefits by Shaykh Hafiz Muhammad Amin Hafizullah, Page: 1093