But as for those in whose hearts is disease, it has [only] increased them in evil [in addition] to their evil. And they will have died while they are disbelievers.
(some who say: "Which of you has had his faith increased by it") They say to each other, who among you had his faith increased by this Surah from the Qur'an Allah the Exalted said,
(As for those who believe, it has increased their faith, and they rejoice.) This Ayah is one of the mightiest evidences that faith increases and decreases, as is the belief of most of the Salaf and later generations of scholars and Imams. Many scholars said that there is a consensus on this ruling. We explained this subject in detail in the beginning of the explanation of Sahih Al-Bukhari, may Allah grant him His mercy. rAllah said next,
Previous verses carried inducement to Jihad. The first verse from the present ones (123) which opens with the words: يَا أَيُّهَا الَّذِينَ آمَنُوا قَاتِلُوا ( O those who believe, fight those disbelievers who are near you) gives details, for disbelievers are spread out all over the world and any confrontation with them has to have some sort of functional sequence. The verse says that Jihad should first be waged against those of the disbelievers who were near. ` Being near' could be taken in terms of the place, that is, the disbelievers who live closer to home base should be fought against first. And it could also be understood in terms of relationship, that is, those who are near in kinship, parentage and other social bonds should be given precedence. This is because Islamic Jihad is essentially carried out in their interest and for their well being, therefore, when it comes to care and concern, kinsfolk have precedence - similar to the command given to the Holy Prophet ﷺ : وَأَنذِرْ عَشِيرَتَكَ الْأَقْرَبِينَ ﴿214﴾ (And warn your near relatives against the punishment of Allah - 26:214). He carried out the command by assembling people from his family and conveyed to them the Word of Allah as revealed to him. The circle then became larger. Keeping the same principle of near and far, confronted first, as compared to others, were disbelievers who lived in the vicinity of Madinah, such as Banu Qurayzah, Banu Nadir and the people of Khaibar. After that came the fight against the rest within the Arabian Peninsula. And after things were settled there, came the last command to fight the disbelievers of Byzantium that resulted in the expedition of Tabuk.