King James Version (KJV) - Hebrews 3:19 >

So we see that they could not enter in because of unbelief.

Textus Receptus (TR) - Hebrews 3:19 >

Καὶ βλέπομεν ὅτι οὐκ ἠδυνήθησαν εἰσελθεῖν δι᾿ ἀπιστίαν.