يَٰٓأَيُّهَا ٱلَّذِينَ ءَامَنُوٓا۟ إِنَّمَا ٱلْمُشْرِكُونَ نَجَسٌ فَلَا يَقْرَبُوا۟ ٱلْمَسْجِدَ ٱلْحَرَامَ بَعْدَ عَامِهِمْ هَٰذَا ۚ وَإِنْ خِفْتُمْ عَيْلَةً فَسَوْفَ يُغْنِيكُمُ ٱللَّهُ مِن فَضْلِهِۦٓ إِن شَآءَ ۚ إِنَّ ٱللَّهَ عَلِيمٌ حَكِيمٌ
Important Words:
نجس (unclean) is derived from نجس which means, it was or became unclean, filthy or impure. نجس therefore, means unclean, filthy or impure; it also signifies, a man having an incurable disease (Lane). نجاسة (uncleanness) is of two kinds; one kind of نجاسة is perceived by the physical senses and the other is perceived by the mind. In the present verse, it is the latter kind of uncleanness that is meant (Mufradat).
سوف (will) is a particle denoting amplification because it changes the aorist from the strait time which is the present to the ample time which is the future and is used with respect to that which has not yet happened; it is a word used to denote promising or threatening. According to some, it is synonymous with س but according to others it has a larger meaning than that letter and is distinct from it by its sometimes having ل prefixed to it. You say ولسوف یعطیک ربک فترضی meaning, And thy Lord will give thee, and thou wilt be well pleased (Lane).
Commentary:
The word نجس(unclean), as shown under Important Words, either means "one who is spiritually unclean", or "one having an incurable disease." Idolaters are, thus, described here as: (1) being spiritually unclean or (2) having become so inured to idolatry that it is almost impossible for them to rid themselves of it. But since Mecca was the birthplace of Islam and a monument of Abraham’s great faith in the One God, it was necessary that the place should be kept spiritually pure; hence the prohibition to idolaters to approach the Sacred Mosque.
The coming of pilgrims to Mecca was a source of great income for Meccans and the prohibition might have given rise to fear in the hearts of some Muslims that their income would thereby be considerably lessened. They are, therefore, told here not to fear poverty, for God would make abundant provision for them out of His bounty.
Mecca was a great commercial centre and the pilgrimage season was an occasion of great commercial activity and a source of great income for the Meccans. The prohibition might have given rise to apprehension that it might adversely affect their income.