Hebrews 6:4
6:4 For it is impossible in the case of those who have once been enlightened, tasted the heavenly gift, become partakers of the Holy Spirit,
Hebrews 10:2
10:2 For otherwise would they not have ceased to be offered, since the worshipers would have been purified once for all and so have 1 no further consciousness of sin?
Hebrews 12:26-27
12:26 Then his voice shook the earth, but now he has promised, “I will once more shake not only the earth but heaven too.” 2
12:27 Now this phrase “once more” indicates the removal of what is shaken, that is, of created things, so that what is unshaken may remain.
1 tn Grk “the worshipers, having been purified once for all, would have.”
2 sn A quotation from Hag 2:6.