Imam Sadiq (peace be upon him): Abu al-Sabbah al-Kinani narrates from Imam Sadiq (peace be upon him) who said: This verse was revealed after the Messenger of Allah (peace be upon him and his family) returned from the Battle of Tabuk, in the ninth year of the Hijrah. "When the Messenger of Allah (peace be upon him and his family) conquered Mecca, he did not prevent the polytheists from performing the Hajj that year. The custom of the Arabs during Hajj was that whoever came to Mecca and performed tawaf in the clothes he was wearing was no longer entitled to keep those clothes; he had to give them away as charity, and they would not wear those clothes after the tawaf. For this reason, everyone who set foot in Mecca and arrived there would borrow a garment and perform tawaf in it, then return it. Whoever could not find someone to lend him a garment, and could not find anyone to rent a garment to him, and had only one garment [besides what he was wearing he had no other clothes], would perform tawaf naked. An Arab woman who was shapely and beautiful sought a borrowed or rented garment, but could not find one. They said to her: 'If you perform tawaf in your clothes, you will have to give them away as charity.' She said: 'How can I give them away as charity when I have only these and no other clothes?' So she performed tawaf around the House naked, and the people looked at her. She placed one of her hands over her front and the other over her back, and recited this verse: "Today part of it, or all of it, becomes visible; but whatever becomes visible of it, I do not permit [looking at]." When she finished the tawaf, several men proposed marriage to her. She said to them: 'I have a husband.' The practice (sirah) of the Messenger of Allah (peace be upon him and his family) before the revelation of Surah al-Bara'ah was that he would not fight anyone except those who fought him, and would not wage war except against those who waged war against him and intended [harm to] him. This verse had been revealed to him in this regard: "So if they withdraw from you and do not fight you and offer you peace, then Allah has not given you a way against them" (An-Nisa 4:90). So the Messenger of Allah (peace be upon him and his family) would not fight anyone who withdrew from him and kept away from him, until Surah al-Bara'ah was revealed and Allah commanded him to fight the polytheists, whether they had distanced themselves from him or not, except those with whom the Messenger of Allah (peace be upon him and his family) had made a covenant for a specified period on the day of the conquest of Mecca — among them Safwan ibn Umayyah and Suhayl ibn Amr. Allah the Mighty and Majestic said: بَراءَةٌ مِنَ اللهِ وَ رَسُولِهِ إِلَی الَّذِینَ عاهَدْتُمْ مِنَ الْمُشْرِکِینَ * فَسِیحُوا فِی الْأَرْضِ أَرْبَعَةَ أَشْهُرٍ [(This is a declaration of) immunity from Allah and His Messenger towards those of the polytheists with whom you made a covenant. So travel freely in the land for four months]. Then wherever they are found, they shall be killed. The months of free movement are these: twenty days of Dhul-Hijjah, and al-Muharram, and Safar, and the month of Rabi al-Awwal, and ten days of the month of Rabi al-Thani. When the verses of Surah al-Bara'ah were revealed, the Messenger of Allah (peace be upon him and his family) gave them to Abu Bakr and ordered him to go to Mecca and recite them to the people at Mina on the day of Nahr (sacrifice). When Abu Bakr had set out, Jibra'il descended upon the Messenger of Allah (peace be upon him and his family) and said: 'O Muhammad! Only a man who is from you can deliver this on your behalf.' The Messenger of Allah (peace be upon him and his family) sent Amir al-Mu'minin (peace be upon him) after Abu Bakr. He caught up with Abu Bakr at al-Rawha and took the verses from him. Abu Bakr returned to the Messenger of Allah (peace be upon him and his family) and said: 'O Messenger of Allah! Has Allah revealed anything concerning me?' He said: 'No, indeed Allah has commanded me that only I, or a man from me, may deliver on my behalf.'"