Parallel
Numbers 8:25
Rahlfs Septuagint (1935) · Berean Standard Bible
καὶ ἀπὸ πεντηκονταετοῦς ἀποστήσεται ἀπὸ τῆς λειτουργίας καὶ οὐκ ἐργᾶται ἔτι
But at the age of fifty, they must retire from performing the work and no longer serve.