Abu Dharr al-Ghifari came from the tribe of Ghifar, far from Makkah. He heard that a man in Makkah claimed to be a prophet. First he sent his brother to find out; the report did not satisfy him. So he came himself.
❝ HadithBecause the Quraysh harmed anyone seeking the Prophet ﷺ, Abu Dharr asked no one and stayed in the Sacred Mosque for days. 'Ali noticed him, took him as a guest, and quietly led him to the Messenger of Allah ﷺ. Hearing him, Abu Dharr accepted Islam at once. Then he said: by Him in whose hand is my soul, I will proclaim it aloud among them. He went to the mosque and shouted the testimony of faith — the people beat him, until al-'Abbas came and shielded him.Sahih al-Bukhari 3522 · Sahih
Returning home, he called his tribe to Islam, and in time much of Ghifar believed.