Moses

Num 21:4-6 The people became irritable and cross as they traveled. 5 They spoke out against God and Moses: "Why did you drag us out of Egypt to die in this godforsaken country? No decent food; no water — we can't stomach this stuff any longer." 6 So GOD sent poisonous snakes among the people; they bit them and many in Israel died After ALL that He had done for them, the people STILL DIDN’T TRUST GOD!