The ruling on raising both feet or one of them during prostration

The questioner:
Honorable Shaykh, may Allah grant you success, I sometimes see people who prostrate while raising both their feet or one of them. Does this invalidate the prayer? And is it obligatory for me to point out this error to them?

The Shaykh:
This is a deficiency in the standing. The one who raises his leg has a deficiency in his standing. However, if this is due to a need, and the standing is long, and he shifts between his legs, this is called shifting. He shifts between his legs because of the length of the standing, or because he is unable and finds it difficult, so he shifts between them due to his inability, and there is no harm in that. But if it is without a need, then it is disliked in the prayer, because it is a deficiency in the standing. Yes.

The questioner:
Raising them during prostration, O Shaykh.

The Shaykh:
And likewise for prostration, no. In prostration, none of the seven limbs is raised. None is raised without an excuse. If he raises it without an excuse, his prostration is not complete and it is not valid. It is necessary to prostrate on all seven limbs: the forehead, the nose, the two hands, the two knees, and the toes. He must prostrate on these seven limbs, unless there is an obstacle in some of them, and he raises it due to an excuse, in which case there is no harm.