Acts 21:19

And when he had saluted them, he declared particularly what things God had wrought among the Gentiles by his ministry.

And when he had saluted them, he declared particularly, [kath' (G2596 ) hen (G1520) hekaston (G1538)] - related in detail,

What things God had wrought among the Gentiles by his ministry - taking it up probably where he had left off his narrative at the great convention (cf. Acts 15:15) and in that case relating the particulars of both his Second and his Third missionary tours (cf. Acts 14:27). In this narrative he would doubtless refer to the persevering efforts of the Judaizing party to shrivel up the Church of Christ into a Jewish sect, which he had had from time to time to meet and counterwork.