'In Me' in the Bible

There were certain men, who were unclean because of the dead body of a man, so that they could not keep the Passover on that day, and they came before Moses and before Aaron on that day.

Yahweh said to Moses, "How long will this people despise me? and how long will they not believe in me, for all the signs which I have worked among them?

Yahweh said to Moses and Aaron, "Because you didn't believe in me, to sanctify me in the eyes of the children of Israel, therefore you shall not bring this assembly into the land which I have given them."