Is the one who abandons prayer considered a disbeliever, making it obligatory for him to return to Islam, knowing that he believes in Allah, His messengers, His books, and the Last Day, whereas the non-believer does not believe in Allah and does not adhere to the Sharia limits?

The website stated that the ruling on occasionally abandoning prayer has been previously explained, and that declaring someone an apostate applies to an adult, accountable person. The statement that abandoning prayer out of negligence constitutes disbelief, despite acknowledging the creed, is not strange, because merely knowing the Sharia is insufficient without submission to and action upon it. Prayer is the pillar of religion, and abandoning it while knowing its obligation is considered obstinacy. Among the conditions for the validity of Islam are truthfulness and sincerity in adhering to its commands; thus, whoever knows the importance of prayer yet is negligent in it, has not achieved truthfulness and sincerity. As for a Muslim inquiring about what is difficult to understand, it is not forbidden, but rather commanded, provided that the intention is sound for learning and removing ambiguities, not for objection. However, the questioner may fall into disbelief if they belittle the established texts of revelation by rejecting them, unlike objecting to a scholar's ijtihad, which is not disbelief.