Mark 2:26 Commentary - Whedon's Commentary on the Old and New Testaments

26. In the days of Abiathar the high priest It appears by the account of the transaction here referred to in 1Sa 21:1, that Ahimelech, father of Abiathar, was the high priest who supplied David the showbread. His son Abiathar was then priest, and afterward high priest; and as such under David attained a celebrity in Jewish history. Jesus, therefore, specifies the time as being the period of Abiathar’s life and office, who afterward became high priest. It is by no means improbable, though there is no other proof than arises from this passage, that Abiathar may have been high priest with his father, as he was high priest a part of his life conjointly with Zadock. There would be no extraordinary error, however, in saying that the American Constitution was formed in the time of President Washington.