Hebrews 7:23

And indeed many {have become} priests, because they were prevented by death from continuing [in office],

1 Chronicles 6:3-14

The children of Amram: Aaron, Moses, and Miriam. The sons of Aaron: Nadab, Abihu, Eleazar, and Ithamar.

Nehemiah 12:10-11

Jeshua fathered Jehoiakim; Jehoiakim fathered Eliashib; Eliashib [fathered] Jehoiada;

Hebrews 7:8

And in this case mortal men receive tithes, but in that case it is testified that he lives.

Treasury of Scripture Knowledge

Summary

And they truly were many priests, because they were not suffered to continue by reason of death:

General references

Bible References

Were

Hebrews 7:8
And in this case mortal men receive tithes, but in that case it is testified that he lives.
1 Chronicles 6:3
The children of Amram: Aaron, Moses, and Miriam. The sons of Aaron: Nadab, Abihu, Eleazar, and Ithamar.
Nehemiah 12:10
Jeshua fathered Jehoiakim; Jehoiakim fathered Eliashib; Eliashib [fathered] Jehoiada;

General references

Numbers 20:26
Strip off Aaron's garments, and put them on Eleazar his son; Aaron will be gathered [to his people], and he will die there."
Zechariah 1:5
"Your ancestors, where are they? And the prophets, do they live forever?