We were with the Prophet ﷺ when a tall, disheveled idolater came driving a flock of sheep. The Prophet ﷺ asked him, "Is this for sale, or is it a gift?"He replied, "No, it is for sale."So he bought a sheep from him.
كنا مع النبي ﷺ، ثم جاء رجل مشرك مشعان طويل بغنم يسوقها، فقال النبي ﷺ: بيعا أم عطية- أو قال- أم هبة؟ قال: لا، بل بيع، فاشترى منه شاة.
Bukhari related it in the Book of Sales (2216), from Abu Numan, who said, Mutamir bin Sulayman narrated to us, from his father, from Abu Uthman, from Abdul-Rahman bin Abu Bakr.His words, "mishan," with the mim vowelled with damma, the shin unvowelled, and ending with a doubled nun, mean tall and unkempt-haired.Ibn Battal said, "Dealing with disbelievers is permissible, except for selling what would help the people of war against the Muslims."