出典:Wiktionary
A reference to Numbers 17:8, the Authorized / KJV translation of which is "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." (spelling modernized).[1]
Aaron's rod (countable かつ uncountable, 複数形 Aaron's rods)