Matthew Poole and continuators on Numbers 17:8

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 .

Into the most holy place, which he might safely do under the protection of Gods command, though otherwise none but the High-priest might enter there, and that once in a year.

This being, as Iosephus with great probability affirms, a staffe of an almond tree, as the rest also were.