New Defender's Study Bible Notes
8:3 Chuza Herod’s steward. Possibly it was through Chuza, the husband of Joanna, that the disciples learned the circumstances around the execution of John the Baptist.
8:3 of their substance. These women followers, including Mary of Magdala, were apparently somewhat well-to-do, and thus were able and willing to share financially in the ministry of Christ and the twelve apostles.