Participle and finite verb, as above. The verb is from καρτερὸς strong, stanch, and means originally to persist obstinately in. In this sense here, and in Rom 12:12; Rom 13:6. Hence to adhere firmly to. So in Mar 3:9, “that a small ship should wait on him;” i.e., keep near at hand. The idea of steady persistence is supplied by the Rev., steadfastly.
With one accord (ὁμοθυμαδὸν)
See on agree, Mat 18:19.
In prayer
The best texts omit and supplication.
Mary
Mentioned here for the last time in the New Testament.