Hebrews 5:4

5:4 And no one assumes this honor on his own initiative, but only when called to it by God, as in fact Aaron was.

Hebrews 7:6

7:6 But Melchizedek who does not share their ancestry collected a tithe from Abraham and blessed the one who possessed the promise.

Hebrews 10:23

10:23 And let us hold unwaveringly to the hope that we confess, for the one who made the promise is trustworthy.