LXX Num 18:26

καὶ τοῖς λευείταις λαλήσεις καὶ ἐρεῖς πρὸς αὐτούς Ἐὰν λάβητε παρὰ τῶν υἱῶν τὸ ἐπιδέκατον ὁ δέδωκα ὑμῖν παρ’ αὐτῶν ἐν κλήρῳ, καὶ ὑμεῖς ἀπ’ αὐτοῦ ἀφαίρεμα κυρίῳ ἐπιδέκατον ἀπὸ τοῦ ἐπικαὶ

“Speak to the Levites and tell them: ‘When you receive from the Israelites the tithe that I have given you as your inheritance, you must present part of it as an offering to the LORD—a tithe of the tithe.