Whoever dies while not associating anything with Allah will enter Paradise, and whoever dies while associating anything with Allah will enter Hellfire

A man asked the Prophet (may Allah's peace and blessings be upon him) about the two traits: one that makes entering Paradise due, and one that makes entering Hellfire due.

In response, the Prophet (may Allah's peace and blessings be upon him) said that the trait that makes entering Paradise due is that a person should die while worshiping Allah alone and associating nothing with Him; and the trait that makes entering Hellfire due is that a person should die while associating anything with Allah, by ascribing to Him a partner or equal in His divinity or lordship or His names and attributes.