Acts 15:21

“For Moses of old time hath in every city them that preach him, etc.] That is, for many years past, even from the times of Ezra, the law of Moses has been publicly expounded by them, whom the Jews call Derashim, preachers, or expounders, in every city where there was a synagogue; and every city belonging to the Jews, were obliged to build a synagogue, yea, they were obliged to do it where there were but ten Israelites f758: this is given by James as a reason why the Gentiles should be wrote unto concerning the above things; because that they hearing the law read and expounded every week, would be ready to conclude that they were obliged to submit unto it, as to circumcision, and other things;…”

“For Moses of old time hath in every city them that preach him . . . every sabbath day--thus keeping alive in every Jew those feelings which such practices would shock, and which, therefore, the Gentile converts must carefully respect if the oneness of both classes in Christ was to be practically preserved. The wisdom of these suggestions commended itself to all present.”

“For Moses - The meaning of this verse is, that the Law of Moses, prohibiting these things, was read in the synagogues constantly. As these commands wore constantly read, and as the Jewish converts would not soon learn that their ceremonial law had ceased to be binding, it was deemed to be a matter of expediency that no needless offence should be given to them. For the sake of peace, it was better that they should abstain from meat offered to idols than to give offence to the Jewish converts. Compare 1 Corinthians 8:10-13.Of old time - Greek: from ancient generations. It is an established custom, and therefore his laws are well known, and have, in their view, not only the authority of…”

“Perhaps the connection is, To the Jews we need write nothing on these heads; for they hear the law continually. Acts 15:22”

“sabbath: Act 13:15, Act 13:27; Neh 8:1-12; Luk 4:16 Acts 15:22”