سورة البقرة

Ali ibn Ibrahim (may Allah have mercy on him): The verse كُتِبَ عَلَيْكُمُ الْقِتالُ وَ هُوَ كُرْهٌ لَكُمْ [Fighting is enjoined on you, and it is an object of dislike to you] was revealed in Medina and abrogated the verse كُفُّوا أَيْدِيَكُمْ [Withhold your hands] which had been revealed in Mecca.

Amir al-Mu'minin (peace be upon him): Jihad is obligatory upon all Muslims, based on the word of Allah: كُتِبَ عَلَيْكُمُ الْقِتالُ [Fighting is enjoined on you]. So if a group of Muslims rises up for jihad, the other Muslims may refrain from participating in the jihad as long as those undertaking the jihad have no need of assistance from them. But if they need it, it is obligatory upon all to help them until they become strong. Allah the Mighty and Majestic said: It is not fitting that the believers should all march out [towards the battlefield of jihad]. (al-Tawba/122) And if some sudden matter arises in which the help of all of them is needed, then all of them [must] leave their homes; for Allah said: [All of you] go forth [towards the battlefield of jihad], light or heavy! And strive with your wealth and your lives in the way of Allah. (al-Tawba/41)

Imam Sadiq (peace be upon him): Jamil Darraj said: I asked Imam Sadiq (peace be upon him) about [these two] words of Allah: كُتِبَ عَلَيْكُمُ الْقِتالُ [Fighting is enjoined on you] and يا أَيُّهَا الَّذِينَ آمَنُوا كُتِبَ عَلَيْكُمُ الصِّيامُ [O you who believe, fasting is prescribed for you]. So he said: All the misguided, the hypocrites, and everyone who acknowledges the outward call — they are the ones intended by this address of the verse. [And they must go to jihad and fast.]

Imam Ali (peace be upon him): [In the Quran, sometimes amid sentences speaking on one topic, suddenly the discourse breaks off and another topic is introduced. These cases, and this] gap that occurs between verses — in such a way that the speech before and after are [in terms of subject] contrary to one another, and the verses are cut off from each other and connected back to what preceded — in the Book of Allah occur in this manner: sometimes a verse addresses a certain matter, then the following verse is, in terms of meaning, cut off from it and speaks of another topic, and after that [again] the verse returns to the previous discourse; like this saying of Allah ... أَقِیمُوا الصَّلاةَ وَ آتُوا الزَّکاةَ [Establish the prayer and give the zakat], then [changing the subject] He says concerning jihad: کُتِبَ عَلَیْکُمُ الْقِتالُ وَ هُوَ کُرْهٌ لَکُمْ وَ عَسی أَنْ تَکْرَهُوا شَیْئاً وَ هُوَ خَیْرٌ لَکُمْ [Fighting is enjoined on you, and it is an object of dislike to you; and it may be that you dislike a thing while it is good for you].