When Safwan came to the Messenger of Allah (ﷺ) with his cloak, he called out to him over the heads of the people, "Muhammad! Wahb ibn Umayr brought me your cloak and claimed that you had summoned me to come to you and if I was pleased with the matter, I should accept it and if not, you would give me a respite for two months. "The Messenger of Allah (ﷺ) said, "Come down, Abu Wahb." He said, "No, by Allah! I will not come down until you make it clear to me." The Messenger of Allah (ﷺ) said, "You have a respite of four months." The Messenger of Allah (ﷺ) went out toward Hawazin at Hunayn. He sent to Safwan ibn Umayya to borrow some equipment and arms that he had. Safwan said, "Willingly or unwillingly?" He said, "Willingly." Therefore he lent him the equipment and arms which he had. Then Safwan went out with the Messenger of Allah (ﷺ) while he was still a kafir. He was present at the battles of Hunayn and at-Ta'if while he was still a kafir and his wife was a muslim. The Messenger of Allah (ﷺ) did not separate Safwan and his wife until he had become muslim, and his wife was settled with him by that marriage.
Arabic : Book 28, Hadith 1139