St Matthew 9:35-38

And Jesus went about all the cities, and towns, teaching in their synagogues, and preaching the gospel of the kingdom, and healing every disease, and every infirmity. And seeing the multitudes, he had compassion on them: because they were distressed, and lying like sheep that have no shepherd. Then he saith to his disciples, The harvest indeed is great, but the labourers are few. Pray ye therefore the Lord of the harvest, that he send forth labourers into his harvest.