And the LORD spake unto Moses, saying,
“And I, behold, I have taken the Levites from among the children of Israel instead of all the firstborn that openeth the matrix among the children of Israel: therefore the Levites shall be Mine; because all the firstborn are Mine; for on the day that I smote all the firstborn in the land of Egypt I hallowed unto Me all the firstborn in Israel, both man and beast: Mine shall they be: I am the LORD.”
Numbers 3:11-13

Then saith He unto His disciples,
“The harvest truly is plenteous, but the labourers are few; pray ye therefore the Lord of the harvest, that He will send forth labourers into His harvest.”
Matthew 9:37-38

And when he had received meat, he was strengthened. Then was Saul certain days with the disciples which were at Damascus. And straightway he preached Christ in the synagogues, that he is the Son of God.
Acts 9:19-20