ISB ~ Acts 13 v2

worshiping:Translates the Greek leitourgeo, which originally meant acts of public service performed on behalf of the state or in honor of a deity. In biblical Greek, the verb is used for the cultic ministry of Aaronic priests and their Levitical assistants in the sanctuary (Ex 28:43; Num 18:2; Sir 45:15; Heb 10:11). Luke’s use of the term follows the biblical tradition, suggesting that the Antiochene Church was worshiping the Lord through various liturgical actions, probably in connection with the Eucharist. In patristic times, this verb was closely associated with the sacramental liturgy of the Church.