Num 11:26 Now two men remained in the camp, one named Eldad, and the other named Medad, and the Spirit rested on them. They were among those registered, but they had not gone out to the tent, and so they prophesied in the camp. And a young man ran and told Moses, “Eldad and Medad are prophesying in the camp.” And Joshua the son of Nun, the assistant of Moses from his youth, said, “My lord Moses, stop them.” But Moses said to him, “Are you jealous for my sake? Would that all the LORD’s people were prophets, that the LORD would put his Spirit on them!”
But there remained two of the men in the camp—They did not repair with the rest to the tabernacle, either from modesty in shrinking from the assumption of a public office, or being prevented by some ceremonial defilement. They, however, received the gifts of the Spirit as well as their brethren. And when Moses was urged to forbid their prophesying, his answer displayed a noble disinterestedness as well as zeal for the glory of God akin to that of our Lord. (Brown)
Joshua, the servant of Moses — Who ministered to him as his constant attendant, one of his chosen ones; which may be emphatically added to signify that even great and good men may mistake about the works of God. My lord Moses, forbid them — It would seem that he thought their prophesying or teaching in the camp tended to make those gifts common, and to disparage Moses in the eyes of the people; or, perhaps, he thought it tended to breed a schism, by calling the people away from the tabernacle, the appointed place of public worship, where the rest of the seventy elders were regularly assembled. (Benson)
Let the example of Moses be followed by those in power; let them not despise the advice and assistance of others, but desire it, and be thankful for it. If all the present number of the Lord’s people were rendered prophets, or ministers, by the Spirit of Christ, though not all agreed in outward matters, there is work enough for all, in calling sinners to repentance, and faith in our Lord Jesus. (Henry)
When the Spirit of God moves in people there is a growing change in them. When this stops there is no longer a maturing change but rather a falling away from God. There is a hardening of the heart, deafening of the ears to hear, and an ever-increasing void in their soul when there is resistance to being led by the Holy Spirit and doing things ordained of God.
Act 7:51 “You stiff-necked people, uncircumcised in heart and ears, you always resist the Holy Spirit. As your fathers did, so do you.