4. εἴρηκεν … που. “He hath said somewhere.” By the indefinite “He” is meant “God,” a form of citation not used in the same way by St Paul, but common in Philo and the Rabbis. We have similar impersonal forms of citation λέγει, φησί, μαρτυρεῖ, &c. in 1Co 6:16; Heb 7:17; Heb 8:5, &c.
που. The “somewhere” of the original is here expressed in the A. V. by “in a certain place,” see note on Heb 2:6. The reference is to Gen 2:2; Exo 20:11; Exo 31:17. The writer always regards the Old Testament not as a dead letter, but as a living voice.