The ruling on one who does not settle in his prayer

Question:
Our brother asks: What is the ruling on the one who prays but does not straighten himself in standing, bowing, or prostrating, and who is also hasty in his recitation? And what is the ruling on the one who directs his gaze to a place other than his place of prostration? Is his prayer valid, or what? Please give us the answer, may Allah reward you with good.

Answer:
As for the one who does not straighten himself in standing from bowing, does not straighten himself in the sitting between the two prostrations, and does not settle, his prayer is not valid. This is because the Prophet (peace and blessings be upon him) saw a man praying, and then the man came and greeted the Prophet (peace and blessings be upon him). The Prophet said to him, "Stand up and pray, for you have not prayed." Then the man came and greeted him a second time, and the Prophet said to him, "Stand up and pray, for you have not prayed." He repeated this to him until the man said, "By Him who sent you as a true prophet, I do not know how to do anything other than this. So teach me." So the Prophet (peace and blessings be upon him) taught him the words and actions of the prayer. In every instance, he said, "until you settle," "until you settle in standing," "until you straighten yourself in standing," "until you settle in sitting," and then do that in all of your prayer.
The Prophet (peace and blessings be upon him) repeated the command to settle. From this, the scholars said that settling is a pillar of the prayer. So whoever leaves it, his prayer is not valid. As for the one who pecks at the prayer, the Prophet (peace and blessings be upon him) forbade it, comparing it to the pecking of a crow, and informed that it is among the characteristics of the prayer of the hypocrite. He said about the hypocrite that he said, "Wretched is , he does not complete its bowing or its prostration, and there is no settling in it," or as the Prophet (peace and blessings be upon him) said.
So he mentioned that the hypocrite wastes time, wastes the settling in the prayer, and wastes the presence of his heart in it. This is among the characteristics of the hypocrites. Before I recite the prayer, it is among the characteristics of the hypocrites. And Allah the Exalted says: .
And qunut is standing firm in obedience. Lengthening the standing indicates that the prayer requires the presence of the heart, and it also requires settling. And Allah the Exalted says: . And whoever makes a mistake in the prayer by pecking at it, and not completing its bowing and prostration and the settling in it.
The prayer is not just a form, just bowing and prostrating, but it is actions and words, opened with the takbir and closed with the taslim, with the presence of the heart, . Khushu' is the spirit of the prayer. A prayer without khushu' is like a body without a spirit. This is regarding the settling.