He said to them, "Why were you looking for me? Didn't you know that I must be in my Father's house?"
Did Jesus not owe it to His parents to tell them beforehand that He planned to linger in the temple so they would not worry about Him? He may have done so and they may have forgotten, but this was not something Luke chose to explain. His purpose was to record Jesus’ response to Mary and Joseph that expressed His awareness of His unique relationship to God and His duty to God. [Note: See I. Howard Marshall, "The Divine Sonship of Jesus," Interpretation 21 (1967):87-103.] 