A valiant, ever-advancing champion, a Companion of the Messenger of Allah ﷺ whose courage became proverbial. He embraced Islam in 9 AH, then apostatized—wronging himself—and claimed prophethood in Najd. Several battles ensued between him and the Muslims, but he was routed and abandoned. He fled to the Jafnah branch of the Ghassanids in greater Syria, then came to his senses, returned to Islam, and his repentance was deemed sound after al-Ṣiddīq passed away; he even entered the state of consecration for the ḥajj.
When ʿUmar saw him he said, “O Ṭulayḥah, I cannot love you after your killing of ʿUkkāshah ibn Miḥṣan and Thābit ibn Aqram.”
Those two had been scouts for Khalid (1) on the day of Buzākhah, and Ṭulayḥah and his brother killed them. Later he fought at Qādisiyyah and Nahāwand.
ʿUmar wrote to Saʿd ibn Abī Waqqāṣ: “Consult Ṭulayḥah about military matters, but do not place him in command of anything.”
Muḥammad ibn Saʿd said: “Because of his bravery and strength, Ṭulayḥah was reckoned the equal of a thousand horsemen.”
I add: He distinguished himself at Nahāwand (2), then was martyred—may Allah have mercy on him and pardon him.