Charles H. Spurgeon on Psalms 99:8

The construction of the verse seems to be this: "O Lord our God, thou didst hear or answer them, "that is, the aforementioned typical mediators, Moses, Aaron, and Samuel: "thou becamest a forbearing God for them, "or, at their intercession; and that "even when punishing, "or, when thou hadst begun to punish "the wicked deeds of them, "that is, not of Moses, Aaron, and Samuel, but of the people, who had transgressed, and for whom they interceded. This was the case when Moses interceded for the idolaters, Ex 22:32, Aaron for the schismatics, Nu 16:47, and Samuel for the whole nation, 1Sa 7:9. George Horne.