TSK · Numbers 4:47

“When Aaron and his sons have finished covering the sanctuary and all the furnishings of the sanctuary, when the camp is ready to journey, then the Kohathites will come to carry them; but they must not touch any holy thing, or they will die. These are the responsibilities of the Kohathites with the tent of meeting.

You must number them from thirty years old and upward to fifty years old, all who enter the company to do the work of the tent of meeting.

The Levites who were thirty years old and up were counted; there were 38,000 men.

And we have different gifts according to the grace given to us. If the gift is prophecy, that individual must use it in proportion to his faith.