Numbers 16:25

"And Moses rose up and went unto Dathan and Abiram; on the elders of Israel followed him. And he spake unto the congregation, saying, Depart, I pray you, from the tents of these wicked men, and touch nothing of theirs, lest ye be consumed in all their sins. So they gat them up from the tabernacle of Korah, Dathan and Abiram, on every side: and Dathan and Abiram came out, and stood at the door of their tents, and their wives, and theirs sons, and their little ones. And Moses said, Hereby ye shall know that Jehovah hath sent me to do all these works; for I have not done them of mine own mind. If these men die the common death of all men, or if they be visited after the visitation of all men; then Jehovah hath not sent me. But if Jehovah make a new thing, and the ground open its mouth, and swallow them up, with all that appertain unto them, and they go down alive into Sheol; then ye shall understand that these men have despised Jehovah."

"The tabernacle of Korah, Dathan and Abiram ..." (Numbers 16:27). This has the utility of identifying the tabernacle (soon to be polluted by Korah and his men) as also being the tabernacle of Dathan and Abiram (in its projected pollution). There was only ONE rebellion, not TWO. The ones who followed Moses understood this and also separated themselves from "the tents" of the rebels, as Moses extended his request for "separation." "Sheol apparently has a more extended meaning in the O.T., but "here it means only the grave."[13]

Very well, if Dathan and Abiram will not come to Moses, them Moses will go to them, and announce the sentence that God pronounced against them through Moses.