Then Jehovah said to Moses and Aaron: […]“Aaron will be gathered to his people. He will not enter the land that I will give to the Israelites […]”
Numbers 20:23,24

The obedience with which Aaron approached his own death is worth noting.
The passage continues to read:
Moses did just as Jehovah had commanded, and they climbed Mount Hor before the eyes of all the assembly. Then Moses removed Aaron’s garments and clothed El·e·a′zar his son with them. After that Aaron died there on the top of the mountain. And Moses and El·e·a′zar came down from the mountain (Nu. 20:27,28).
Aaron had already rebelled once when he and Moses took undue credit for providing the people with water at Meribah (Nu. 20:12).
Evidently he learned his lesson and when his time came to pass away, he was faithful til the end, humbly yielding his position to his son in alignment with God’s arrangements.
Although most people are unaware of when their lives will end, it is wise to live each day with an obedient, humble attitude such as the one displayed by Aaron.