Don't limit the Spirit
Moses rightly tells Joshua that there is no need to limit if someone is speaking under the power of the spirit. And of course, Moses request comes true in New Testament times when all of us in baptism are granted the gift of the Holy Spirit.
Numbers 11:29–30The Lexham English Bible
But Moses said to him, “Are you jealous for my sake? Would that he give all Yahweh’s people prophets, that Yahweh put his spirit on them!” Then Moses and the elders of Israel were gathered to the camp.