G3008–λειτουργέω–leitourgeō

While they were worshipping the Lord and fasting, the Holy Spirit said, "Set apart for Me, now at once, Barnabas and Saul, for the work to which I have called them."

λειτουργούντων leitourgountōn “As were ministering”

Yes, they have kindly done this, and, in fact, it was a debt they owed them. For seeing that the Gentiles have been admitted in to partnership with the Jews in their spiritual blessings, they in turn are under an obligation to render sacred service to th

λειτουργῆσαι leitourgēsai “to minister”

And while every priest stands ministering, day after day, and constantly offering the same sacrifices--though such can never rid us of our sins--

λειτουργῶν leitourgōn “ministering”