Exodus 32:9

32:9 Then the Lord said to Moses: “I have seen this people. Look what a stiff-necked people they are!

Exodus 33:3-5

33:3 Go up to a land flowing with milk and honey. But I will not go up among you, for you are a stiff-necked people, and I might destroy you on the way.”

33:4 When the people heard this troubling word they mourned; no one put on his ornaments. 33:5 For the Lord had said to Moses, “Tell the Israelites, ‘You are a stiff-necked people. If I went up among you for a moment, I might destroy you. Now take off your ornaments, that I may know what I should do to you.’”

Isaiah 48:4

48:4 I did this because I know how stubborn you are.

Your neck muscles are like iron

and your forehead like bronze.