Numbers 20:29

Overview - Numbers 20
1	The children of Israel come to Zin, where Miriam dies.
2	They murmur for want of water.
7	Moses smiting the rock, brings forth water at Meribah.
14	Moses at Kadesh desires passage through Edom, which is denied him.
22	At mount Hor Aaron resigns his place to Eleazar, and dies.

Numbers 20:29  (King James Version)
And when all the congregation saw that Aaron was dead, they mourned for Aaron thirty days, even all the house of Israel.