The hand of the Lord was with them (ēn cheir kuriou met' autōn). This O.T. phrase (Exo 9:3; Isa 59:1) is used by Luke (Luk 1:66; Act 4:28, Act 4:30; Act 13:11). It was proof of God’s approval of their course in preaching the Lord Jesus to Greeks.
Turned unto the Lord (epestrepsen epi ton kurion). First aorist active indicative of epistrephō, common verb to turn. The usual expression for Gentiles turning to the true God (Act 14:15; Act 15:3, Act 15:19; Act 26:18, Act 26:20; 1Th 1:9). Here “Lord” refers to “the Lord Jesus” as in Act 11:20, though “the hand of the Lord” is the hand of Jehovah, clearly showing that the early disciples put Jesus on a par with Jehovah. His deity was not a late development read back into the early history.