וַיְהִ֣י מִֽמָּחֳרָ֗ת וַיָּבֹ֤א מֹשֶׁה֙ אֶל־אֹ֣הֶל הָעֵד֔וּת וְהִנֵּ֛ה פָּרַ֥ח מַטֵּֽה־אַהֲרֹ֖ן לְבֵ֣ית לֵוִ֑י וַיֹּ֤צֵֽא פֶ֙רַח֙ וַיָּ֣צֵֽץ צִ֔יץ וַיִּגְמֹ֖ל שְׁקֵדִֽים׃
And it came to pass on the morrow, that Moses went into the tent of the testimony; and, behold, the rod of Aaron for the house of Levi was budded, and put forth buds, and bloomed blossoms, and bore ripe almonds.
Read kabbalistic (mystical) interpretation of Numbers 17:23: and classical mystical sources.