Luke leaves out Egypt trip

‎Luke simply leaves the Egyptian episode out of the record, as having been already fully narrated by Matthew, with whose Gospel he would be acquainted before he began to write his own; giving prominence rather to details of which Matthew says nothing. The room for it, on this view, would he in Luke’s word “returned” in verse 39: they “returned” (via Egypt) on their journey to which, he deemed it superfluous to say anything........The other suggestion is that if Luke meant that Joseph and Mary returned to Nazareth immediately after the presentation of Jesus in the Temple, then they must have returned to Bethlehem sometime afterwards (possibly to complete the business of the family enrolment.) NR p40