(And fight in the way of Allah those who fight you,)
Abu Al-`Aliyah said, "This was the first Ayah about fighting that was revealed in Al-Madinah. Ever since it was revealed, Allah's Messenger ﷺ used to fight only those who fought him and avoid non-combatants. Later, Surat Bara'ah (chapter 9 in the Qur'an) was revealed." `Abdur-Rahman bin Zayd bin Aslam said similarly, then he said that this was later abrogated by the Ayah:
1. When the Holy Prophet decided to travel to Makkah in the year 7 A.H. to perform his qada"Umrah as envisaged in the peace treaty of Hudaybiyyah; his Companions ؓ who were to accompany him knew that disbelievers could not be trusted with treaties, or peace. It was quite possible that they may start fighting. Now, the blessed Companions had a problem before them. They thought if this fighting came, it would have to be within the sacred precincts of Makkah, which is not permissible in Islam. This doubt was answered in Verse 191 by stating that the sanctity of the sacred precincts of Makkah must certainly be observed by Muslims, but should the disbelievers start to fight within the sacred limits, then, it is permissible for them to fight back in defence.
2. The second problem that bothered the noble Companions was about the month, which was Dhul-Qa'dah ذوالقعدہ ، being one of the four known as the 'sacred months' wherein fighting anyone anywhere was not permissible. Now, the Muslims thought if the disbelievers of Makkah started fighting against them how could Muslims fight a defensive battle during a 'sacred month'? The verse under reference (194) was revealed to answer this doubt. The answer is that, the way a state of defence grants an exception to observing the sanctity of the Haram of Makkah, in the same manner, it allows an exception to observing the sanctity of the 'sacred months' also.
Tazkirul Quran
Maulana Wahiduddin KhanOn ayahs 191–192
The fighting (qital) mentioned here refers to that which took place during the life of the Prophet Muhammad. The Prophet’s Makkan opponents, not content with just expelling the Prophet and his companions from Makkah, their hometown, also prevented them from living and working peacefully in the neighbouring town of Yathrib (Madinah) where they had gone to settle. Without any provocation, they repeatedly attacked the Muslims who then had to fight in self-defence. When aggression has already been committed by opponents, believers are obliged to defend themselves. Initiating hostilities is not permitted for Muslims. Only defensive war is permitted in Islam. Even defensive war has to be openly declared by an established state.
Uthmani text of the Madinah mushaf (King Fahd Complex). Translation: Saheeh International. Tafsir via Quran.com.
