“and to Him it will return,” meaning: we do not declare anyone who faces the qiblah to be an unbeliever on account of a sin, so long as he does not regard it as lawful.
In the last days the Qur’an will be raised up to Allah—this is one of the signs of the Hour. It will be taken out of the written copies and out of people’s hearts until nothing of it remains on earth.
(We do not declare anyone who faces the qiblah to be an unbeliever on account of a sin unless he regards it as lawful.) As has already been explained, when a sin is neither disbelief nor idolatry that expels one from the religion, we do not pronounce a Muslim to be a disbeliever because of it. Rather, we hold that he is a believer whose faith is deficient, subject to the threat of punishment and under Allah’s will. This is the creed of the Muslim—provided he does not deem the sin permissible. If he does consider lawful what Allah has forbidden—such as riba (usury), wine, carrion, pork, or fornication—then he disbelieves in Allah. The reverse is likewise true: whoever declares unlawful what Allah has made lawful becomes a disbeliever, as in His words, “They have taken their rabbis and monks as lords besides Allah, and (also) the Messiah son of Mary” (Al-Tawbah 9:31). The verse has been explained to mean that they made the unlawful lawful for them and the lawful unlawful, and the people obeyed them. (1)
As for the one who commits a sin while acknowledging that it is forbidden and without declaring it lawful, he does not become a disbeliever—even if the sin is a major one short of shirk and outright disbelief. Such a person remains a believer, though with deficient faith, or a sinner (fāsiq) on account of his grave offense, yet a believer by virtue of his faith.