Most scholars disputed him on this point. They said:
Anyone who deliberately omits an obligatory act must repeat the prayer whenever repetition remains possible, for he has failed to do what he was commanded to do despite being capable of doing it; therefore, that duty is not waived for him.
Al-Bukhārī and Muslim narrated (1) in their two Sahih collections the hadith of the man who performed his prayer improperly. The Prophet—may Allah bless him and grant him peace—*) (2) said to him:
“Go back and pray, for you have not prayed.”
He then instructed him to pray with composure (3). This authentic hadith therefore demonstrates that what a person performs after omitting an obligatory act does not constitute prayer; rather, he is commanded to pray. The Lawgiver—may Allah bless him and grant him peace—(4) denies something its designation only when some of its obligatory elements are absent. Thus, he said:
“For you (5) have not prayed,”
because the man had omitted some of prayer’s obligatory elements, and his prayer was neither complete nor established in the manner commanded in the words of Allah Most High:
“When you are secure, establish the prayer.”
[Surah al-Nisā’: 103]
He thus commanded that it be performed in full.
Likewise, when He commanded that Hajj and Umrah be completed, He said:
“Complete Hajj and Umrah for Allah.”