Amr bin Maymun (may Allah have mercy on him) narrates from Sayyiduna Mu'adh bin Jabal (may Allah be pleased with him); he said: I was riding behind the Messenger of Allah (peace and blessings be upon him), and he (peace and blessings be upon him) said: "O Mu'adh! Do you know what the right of Allah upon the people is?" I said: Allah and His Messenger know best. He (peace and blessings be upon him) said: "His right upon them is that they worship Him and do not associate anything with Him. O Mu'adh! Do you know what the right of the people upon Allah is if they do that? That He does not punish them." I said: O Messenger of Allah! Shall I not give the people the glad tidings? He (peace and blessings be upon him) said: "Leave them, let them keep doing deeds."
Hadith Referenceالمعجم الكبير للطبراني / باب الميم / 17390