Luke 2:45

He is not found as soon as sought for, for Jesus was not among His kinsfolk and relations, among those who are joined to Him in the flesh, nor in the company of the multitude can He be found. Learn where those who seek Him find Him, not every where, but in the temple. And do thou then seek Jesus in the temple of God. Seek Him in the Church, and seek Him among the masters who are in the temple. For if thou wilt so seek Him, thou shalt find Him. They found Him not among His kinsfolk, for human relations could not comprehend the Son of God; not among His acquaintance, for He passes far beyond all human knowledge and understanding. Where then do they find Him? In the temple! If at any time thou seek the Son of God, seek Him first in the temple, thither go up, and verily shalt thou find Christ, the Word, and the Wisdom, (i. e. the Son of God.)

(cont. Hær. l. ii. hær. 31.) Let Ebion know that at twelve years old, not thirty, Christ is found the astonishment of all men, wonderful and mighty in the words of grace. We can not therefore say, that after that the Spirit came to Him in Baptism He was made the Christ, that is, anointed with divinity, but from His very childhood He acknowledged both the temple and His Father.

(ordin.) Or they feared lest Herod who sought Him in His infancy, now that He was advanced to boyhood might find an opportunity of putting Him to death.