Hebrews 2:2

2:2 For if the message spoken through angels ¹  proved to be so firm that every violation ²  or disobedience received its just penalty,

Hebrews 4:6

4:6 Therefore it remains for some to enter it, yet those to whom it was previously proclaimed did not enter because of disobedience.

Hebrews 4:11

4:11 Thus we must make every effort to enter that rest, so that no one may fall by following the same pattern of disobedience.

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¹ sn The message spoken through angels refers to the OT law, which according to Jewish tradition was mediated to Moses through angels (cf. Deut 33:2; Ps 68:17-18; Acts 7:38, 53; Gal 3:19; and Jub. 1:27, 29; Josephus, Ant. 15.5.3 [15.136]).

² tn Grk “through angels became valid and every violation.”