Hebrews 13:6

13:6 So we can say with confidence, “The Lord is my helper, and ¹  I will not be afraid. What can man do to me?” ² 

Hebrews 10:30

10:30 For we know the one who said, “Vengeance is mine, I will repay,” ³  and again, “The Lord will judge his people.” ⁴ 

[13:6]  ¹ tc Some important mss (א* C* P 0285^vid 33 1175 1739 pc lat) lack καί (kai), but because the omission conforms to the wording of Ps 118:6 (117:6 LXX), it is suspect.

[13:6]  ² sn A quotation from Ps 118:6.

[10:30]  ³ sn A quotation from Deut 32:35.

[10:30]  ⁴ sn A quotation from Deut 32:36.