from
Easton's 1897 Bible Dictionary
Eldad
whom God has loved, one of the seventy elders whom Moses
appointed (Num. 11:26, 27) to administer justice among the
people. He, with Medad, prophesied in the camp instead of going
with the rest to the tabernacle, as Moses had commanded. This
incident was announced to Moses by Joshua, who thought their
conduct in this respect irregular. Moses replied, "Enviest thou
for my sake? would God that all the Lord's people were prophets"
(Num. 11:24-30; comp. Mark 9:38; Luke 9:49).