Musannaf Ibn Abi Shaybah

Hazrat Abdur Rahman bin Qasim says that I prayed with Hazrat Hafs bin Asim. When I went into prostration, I spread my fingers apart and turned my palms away from the Qiblah. When I finished the prayer, he said, "O nephew! When you prostrate, keep your fingers together and keep your hands facing the Qiblah, because along with the face, the hands also prostrate."