Cosmas & Damian the Holy Unmercenaries
The Gospel According to Matthew 10:1, 5-8
At that time, Jesus called to him his twelve disciples and gave them authority over unclean spirits, to cast them out, and to heal every disease and every infirmity. These twelve Jesus sent out, charging them, "Go nowhere among the Gentiles, and enter no town of the Samaritans, but go rather to the lost sheep of the house of Israel. And preach as you go, saying, 'The kingdom of heaven is at hand.' Heal the sick, raise the dead, cleanse lepers, cast out demons. You received without paying, give without pay."