Hebrews 12:28

12:28 So since we are receiving an unshakable kingdom, let us give thanks, and through this let us offer worship pleasing to God in devotion and awe.

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 

[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.