The ruling on one who does not complete his bowing in prayer

The questioner:
May Allah reward you, Honorable Shaykh. This questioner says: Is the one who says that the person who does not complete his bowing is a Muslim but not a believer, because he did not magnify the Lord, correct?

The Shaykh:
What?

The questioner:
He says: Is the one who says that the person who does not complete his bowing is a Muslim but not a believer?

The Shaykh:
Does not complete.

The questioner:
His bowing, that he is a Muslim but not a believer, because he did not magnify the Lord, is this statement correct?

The Shaykh:
And why single out the bowing? There is also one who does not complete the prostration, and one who does not complete the recitation of al-Fatihah. No, the entire prayer is required to be completed. If he does not complete it, if he does not complete the pillars of the prayer, he is liable to be ordered to repeat it, but he is not declared a disbeliever, because he did not abandon the prayer, he did not abandon it, but he performed it poorly. When the Messenger (peace and blessings be upon him) saw the one who performed his prayer poorly, he did not declare him a disbeliever, but he taught him. He said to him: Pray, for you have not prayed. He repeated this to him and did not declare him a disbeliever because he was ignorant. Then when he said: By Him who sent you as a true prophet, I do not know how to pray except this, he taught him. He taught him (peace and blessings be upon him) how to pray? He taught him how to pray. Yes.