Numbers 17:8

And it came to pass, that on the morrow Moses went into the tabernacle of witness; and, behold, the rod of Aaron for the house of Levi was budded, and brought forth buds, and bloomed blossoms, and yielded almonds.

Cross-references

Numbers 17:5 promised that the chosen rod would blossom; here that promise is fulfilled with Aaron's rod budding and producing almonds.

Hebrews 9:4 explicitly lists 'Aaron's rod that budded' among the ark's contents, confirming it was kept as a memorial.