Shaykh Muhammad ibn Saalih al-Uthaymeen رحمه الله said:
” It is not permissible for a person while in sujood (prostration) to lift his hands (off the ground) or one of his hands or his feet or one of his feet, because it is an obligation to perform sujood upon the seven limbs: the forehead with the nose, the palms (hands), the knees, and the toes (feet); and if he lifts (and keeps) them up until he rises from sujood then his prayer is nullified. But if he lifts (them up) and then quickly puts them down, then I hope that he will not have to repeat the prayer. “
[Sharh Riyaad As-Saaliheen by Shaykh Ibn Uthaymeen, 4/22]