I heard that the Prophet (peace and blessings be upon him) said to 'Ali (may Allah be pleased with him): “Shall I give you five thousand sheep, or shall I teach you… etc.” Is this hadith authentic?

Question:
May Allah reward you with good and do you good. I heard that the Prophet (peace and blessings be upon him) said to 'Ali (may Allah be pleased with him): “Shall I give you five thousand sheep, or shall I teach you five words in which is the well-being of your religion and your worldly life?” So I said: “O Messenger of Allah, five thousand sheep is a lot, but teach me.” Then the Messenger (peace and blessings be upon him) said: “Say: O Allah, forgive my sin, expand my character, make my earnings pure, make me content with what You have provided for me, and do not let my heart turn to anything You have turned me away from.” Is this story reported from the Messenger (peace and blessings be upon him)? And if it is not reported, is there anything in the supplication that prevents its recitation? May Allah reward you with good.

Answer:
I do not know this to be established from the Messenger (peace and blessings be upon him), so it is not appropriate to make this supplication, because one should not supplicate except with what is established from the Messenger (peace and blessings be upon him).