Numbers 16:12

And Moses sent to call Dathan and Abiram, the sons of Eliab,.... He sent messengers to call them to the house of judgment, as the Targum of Jonathan, to the court of judicature, where the Jews suppose Moses, with the seventy elders, were now sitting: it seems these two men departed either before. Moses rose up from prayer, or however before he had finished his speech to Korah and the Levites; which being particularly directed to them, these men might think they had no concern in it, and went away to their own tents:

which said, we will not come up; this answer they returned to the messengers, and by them to Moses, declaring that they denied his power, despised his authority, and would not obey his orders, and therefore refused to come up to the tabernacle, or to the tent of Moses, or to the court of judicature, wherever it was; perhaps the first is best. Aben Ezra thinks, that as the tabernacle was in the midst of the camp, it was on an eminence, wherefore those that came to it might be said to come up to it.