Is it obligatory to make up missed prayers for someone who deliberately abandoned them due to negligence and laziness for two weeks, knowing that he has repented and can specify the number of days?

Intentionally missing a prayer until its time has expired is one of the gravest sins and most severe destructive acts. Its sin is greater than that of murder, adultery, theft, and drinking alcohol.

The differing opinions on the ruling concerning one who abandons prayer: - Many scholars hold the view that whoever intentionally abandons prayer until its time expires has committed an act of disbelief (kufr). - The majority of scholars hold the view that such a person does not commit disbelief, but is rather a severely immoral transgressor (fasiq), and must make up the prayers after repenting. - Whoever abandons prayer without denying its obligation must repent and make up the missed prayers in a manner that does not harm their body or livelihood. - The statements of the Imams regarding the ruling on one who abandons prayer out of laziness: - Malik, Al-Shafi'i, and the majority of the early and later generations (Salaf and Khalaf): They do not commit disbelief, but are rather immoral transgressors. They are given a chance to repent; if they do not repent, they are executed as a legal punishment (hadd). - A group from the early generations (Salaf): They commit disbelief. - Abu Hanifa and a group of the people of Kufa: They do not commit disbelief and are not executed, but are rather reprimanded and imprisoned until they pray. - The majority cited as evidence for the non-disbelief of one who abandons prayer the verse, "Indeed, Allah does not forgive association with Him, but He forgives what is less than that for whom He wills," and the Ahadith of Tawhid (monotheism).