Hazrat Jaabir (radhiyallahu ‘anhu) narrates:

For ten long years, Rasulullah (sallallahu ‘alaihi wasallam) would go to meet the people in their homes, in the market places and in their social functions. He would invite them towards Islam and say to them:

من يؤويني ومن ينصرني حتى أبلغ رسالة ربي وله الجنة

“Who will support me and who will assist me in conveying the message of my Rabb? For him (the one who assists me), I guarantee Jannah.