The Death of Aaron

In the second half of chapter 20, in the book of Numbers, the Israelites come to the kingdom of  Edom.

Moses sent messengers on to Edom, requesting passage through their country with the promise that they will neither stray from the path nor drink from their wells.  For if they do, they will pay for it in full.

The request was denied.

Needless to say, the Israelites took another route, and when they reached the borders of Edom at Mount Hor, God told them that Aaron was to die and go no further.  This punishment was due to their misbehavior when they struck the rock to give water to their people, and falsely said that they were the ones who did it, not God.

After Aaron's death, Eleazar (Aaron's son) was promoted to Aaron's place and the Israelites mourned his death for 30 days.