As the large fields require many reapers, so also do the multitude of believers in Christ. Hence He adds, Pray ye therefore the Lord of the harvest, that he would send forth labourers into his harvest. Now mark that when He said, Pray ye therefore the Lord of the harvest, that he would send forth labourers into the harvest, He afterwards Himself performed it. He then is the Lord of the harvest, and by Him, and together with Him, God the Father rules over all.
Reproduced in full. Translation: Oxford 1841 (Newman), public domain (Public domain).
Also cites: non occ. v. Tit. Bost.