Preserving the Prayer in Its Completeness

Question:
Honorable Shaykh, a questioner says: If a person prays, but in some of the obligatory prayers he shortens them and is lazy, what are the actions we should take to preserve the prayer in its completeness?

Answer:
He is required to preserve the prayer in its times, in its manner, in the number of its rak'ahs, and in the tranquility within it, because it is the head of his wealth in this life, in this worldly life, and the first thing a servant will be held accountable for on the Day of Resurrection from his deeds is his prayer. If it is accepted, the rest of his deeds will be accepted, and if it is not accepted, the rest of his deeds will be rejected. So the Muslim should take care of his prayer. If he has been neglecting it and then repents to Allah with a sincere repentance, he is required to preserve it. If what he left behind is a small number of prayers and he is able to make them up, he should make them up. The Messenger (peace and blessings be upon him) said: Yes.