Luke 10:1
English originalThis mission is found only in Luke, but the instructions are similar to some of those given the Twelve in the other Gospels. As to the number sent out, available manuscripts are divided between "seventy" and "seventy-two," and there is no way of being certain which number was original. Both represent the number of nations (cf. Luke 24:44-49) of the world in Genesis 10 (the Hebrew text has 70 names; the Greek, 72). Hendriksen quotes two different scholars saying:
Brown
Seventy is right, for it is clear that Jesus is here pictured as the Antitype of Moses, who, at God's command, appointed seventy elders to assist him. On these seventy the Spirit rested. See Num. 11:16-25.
Smith
You are forgetting Eldad and Medad, on whom God's Spirit also rested (Num. 11:26), making seventy-two in all.
Both numbers indicate that Jesus used the services of many humble people as well as those of the Twelve.
It may also be significant that the Septuagint, that is the Greek version of the Old Testament, was translated in 72 days by 72 scholars (see below). Jesus had also sent out the Twelve in pairs (Mark 6:7). This afforded mutual support, as well as the benefit of the testimony of two witnesses (cf. Deut. 17:6).
seventy. Or, possibly, seventy-two, depending on manuscript evidence. These were disciples sent out by Jesus in addition to the twelve apostles (v. 3). This could be a reference to the table of nations (Gen. 10). Some see this in reference to the elders appointed by Moses (Num. 11:16-30). They numbered seventy (or seventy-two, if Eldad and Medad are counted, Num. 11:26). The Lord allowed them to share in the Spirit given to Moses. Likewise, the group of disciples here is given power by the Lord Jesus for their ministry of preaching (v. 9).