Matthew 2:4 - Ellicott's Commentary On The Whole Bible

The chief priests and scribes. — The chief priests were probably the heads of the twenty-four courses into which the sons of Aaron were divided (2 Chronicles 23:8; Luke 1:5), but the term may have included those who had, though only for a time, held the office of high priest. The “scribes” were the interpreters of the Law, casuists and collectors of the traditions of the Elders, for the most part Pharisees. The meeting thus convened was not necessarily a formal meeting of the Sanhedrim or Great Council, and may have been only as a Committee of Notables called together for a special purpose. With a characteristic subtlety, as if trying to gauge the strength of their Messianic hopes, Herod acts as if he himself shared them, and asks where the Christ, the expected Messiah, the “anointed” of the Lord (Psalms 2:2; Psalms 45:7; Psalms 89:20) was to be born.