Albert Barnes Commentary Acts 28:23

"And when they had appointed him a day, they came to him into his lodging in great number; to whom he expounded [the matter,] testifying the kingdom of God, and persuading them concerning Jesus, both from the law of Moses and from the prophets, from morning till evening." — Acts 28:23 (ASV)

Appointed him a day. A day when they would hear him.

To his lodging. To the house where he resided (Acts 28:30).

He expounded. He explained or declared the principles of the Christian religion.

And testified the kingdom of God. Bore witness to, or declared the principles and doctrines of the reign of the Messiah. (See Matthew 3:2.)

Persuading them concerning Jesus. Endeavoring to convince them that Jesus was the Messiah.

Both out of the law of Moses. Endeavoring to convince them that He corresponded with the predictions respecting the Messiah in the books of Moses (Genesis 49:10; Deuteronomy 18:18), and with the types which Moses had instituted to prefigure the Messiah.

And out of the prophets. Showing that He corresponded with the predictions of the prophets. (See Acts 17:3.)

From morning till evening. An instance of Paul's indefatigable toil in endeavoring to win his own countrymen to Jesus as the Messiah.

Law and prophets (Acts 26:6, 22).

"Testified": "bore testimony to".