Mark 2:26

Overview - Mark 2
Christ followed by multitudes,
heals one sick of the palsy;
13 calls Matthew from the receipt of custom;
15 eats with Publicans and sinners;
18 excuses his disciples for not fasting;
23 and for plucking the ears of corn on the sabbath day.
Treasury of Scripture Knowledge

Mark 2:26  (King James Version)
How he went into the house of God in the days of Abiathar the high priest, and did eat the shewbread, which is not lawful to eat but for the priests, and gave also to them which were with him?

It appears from the passage referred to here, that Ahimelech was then high priest at Nob; and from other passages, that Abiathar was his son. Various conjectures have been formed in order to solve this difficulty; and some, instead of untying, have cut the knot, by pronouncing it an interpolation. The most probable opinion seems to be, that both father and son had two names, the father being also called Abiathar; and this appears almost certain from 2 ; Sa 8:17 1 ; Ch 18:16 where Ahimelech seems evidently termed Abiathar, while Abiathar is called Ahimelech or Abimelech
(Compare 1 ; Ki 2:26 27.)
1 Samuel 22:20-22 ; 1 Samuel 23:6 1 Samuel 23:9 2 Samuel 8:17 ; 2 Samuel 15:24 2 Samuel 15:29 2 Samuel 15:35 20:25 1 Kings 1:7
1 Kings 2:22 1 Kings 2:26 1 Kings 2:27 ; 4:4

which is not lawful
Exodus 29:32 Exodus 29:33 ; Leviticus 24:5-9