The position of you (O Ali) to me is like Haroun (Aaron) to Moses

انتَ (یاعلیُّ) مِنّی بِمَنزِلَةِ هارونَ مِن موسی اِلّا اَنَّهُ لانَبیَّ بعدی

The Holy Prophet of Islam (saw) states: The position of you (O Ali) to me is like Haroun (Aaron) to Moses, except that there will be no prophet after me.

Sahih Muslim, vol. 4, p. 44