Sahih Muslim Book 1, Hadith Number 364.

Chapter : The lowest of the ranks in Paradise.

Sha’bi reported he had heard al-Mughira b. Shu’ba say on the pulpit that Moses (peace be upon him) had asked Allah, Exalted and Great, about the reward of the lowest of the inhabitants of Paradise, and the remaining part of hadith is the same (as narrated) above.