The Gospel According to Matthew 9:36-38; 10:1-8
At that time, when Jesus saw the crowds, he had compassion for them, because they were harassed and helpless, like sheep without a shepherd. Then he said to his disciples, "The harvest is plentiful, but the laborers are few; pray therefore the Lord of the harvest to send out laborers into his harvest."
And he 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. The names of the twelve apostles are these: first, Simon, who is called Peter, and Andrew his brother; James the son of Zebedee, and John his brother; Philip and Bartholomew; Thomas and Matthew the tax collector; James the son of Alphaios, and Lebbaeos called Thaddaios; Simon the Cananaean, and Judas Iscariot, who betrayed him. 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."