John 9:4 I must work the works of him that sent me, while it is day: the night cometh, when no man can work.

Luke 10:1-2 After these things the Lord appointed other seventy also, and sent them two and two before his face into every city and place, whither he himself would come.

Therefore said he unto them, The harvest truly is great, but the labourers are few: pray ye therefore the Lord of the harvest, that he would send forth labourers into his harvest.