en_tn/luk/02/39.md

that they were required to do according to the law of the Lord

Possible meanings are 1) "that the law of the Lord required them to do" or 2) "that the law which the Lord commanded required them to do."

increasing in wisdom

"became more wise" or "learned what was wise"

the grace of God was upon him

This could be translated as "God blessed him" or "God was with him in a special way."