Numbers 16:15

And Moses was very wroth, and said unto the LORD, Respect not thou their offering: I have not taken one ass from them, neither have I hurt one of them.

Moses was very wroth. Though the meekest of all men, he could not restrain his indignation at these unjust and groundless charges; and the highly excited state of his feelings was evinced by the utterance of a brief exclamation, in the mixed form of a prayer and an impassioned assertion of his integrity (cf. 1 Samuel 12:3).

Respect not thou their offering. He calls it their offering, because, though it was to be offered by Korah and his Levitical associates, it was the united appeal of all the mutineers for deciding the contested claims of Moses and Aaron.