Sayyiduna Sawad bin Qarib al-Azdi (may Allah be pleased with him) said: I was asleep on one of the mountains of al-Sarah when someone came, struck me with his foot and said: O Sawad bin Qarib, get up; a Messenger has come to you from Lu'ayy bin Ghalib. I sat upright, and he turned away, saying (in the sari' metre): "I marvel at the jinn and their seeking out news, and at their saddling of their camels with their camel-saddles. They rush towards Makkah seeking guidance; their righteous are not like their filthy ones." Then I went back to sleep, and he came again, struck me with his foot and said: O Sawad bin Qarib, get up; a Messenger has come to you from Lu'ayy bin Ghalib. And he turned away, saying: "I marvel at the jinn and their news, and at their loading of their camels with their saddles. They rush towards Makkah seeking guidance; their believers are not like their disbelievers." Then I went back to sleep, and he came again, struck me with his foot and said: O Sawad bin Qarib, get up; a Messenger has come to you from Lu'ayy bin Ghalib. I sat upright, and he turned away, saying: "I marvel at the jinn and their seeking, and at their tying of the camels by their tails. They rush towards Makkah seeking guidance; their truthful one is not like their liar. So journey to the chosen one of Hashim, and raise your eyes towards its head." Then morning came, and I rode my camel until I reached Makkah, and there the Messenger of Allah (peace and blessings be upon him) had already appeared (with Islam). I told him (peace and blessings be upon him) the news and became his follower.
Hadith Referenceالمعجم الكبير للطبراني / باب السين / 6446