Bede the Venerable
Catena Aurea · Lukasevangelium 10
Lk 10, Verses 1–2English original
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.
Rightly are seventy-two sent, for to so many nations of the world was the Gospel to be preached, that as at first twelve were appointed because of the twelve tribes of Israel, so, these also were ordained as teachers for the instruction of the foreign nations.