Dimam ibn Tha'labah

Ḍimām ibn Thaʿlabah was an elder of Banū Saʿd ibn Bakr, the Bedouin branch of Hawāzin that had raised the Prophet ﷺ in infancy through Ḥalīmah al-Saʿdiyyah, sent to Madinah to negotiate a treaty, not to convert. He arrived a rough, hairy, gruff man wearing the two long braids of a Bedouin, brought his camel right up to the door of the masjid and tethered it there, and walked in demanding: which of you is the son of ʿAbd al-Muṭṭalib?

Warning the Prophet ﷺ that he would question him harshly and asking him not to take offence, إِنِّي سَائِلُكَ فَمُشَدِّدٌ عَلَيْكَ, he made him swear by the One who created the heavens, the earth and the mountains that Allah had truly sent him, and then, oath by oath, that Allah had commanded the five prayers, the zakāh, the fast and the Ḥajj. Satisfied, he swore that he would perform exactly this and neither add to it nor subtract from it: لَا أَزِيدُ عَلَىٰ شَيْءٍ. The Prophet ﷺ said that if he was truthful, he would enter Paradise.

He returned to his people and preached to them the same day, destroying the idol they worshipped; his whole tribe embraced Islam. Ibn Isḥāq records the judgement that no envoy was ever a greater blessing to his people than Ḍimām.