Exodus 23:27עֹרֶף
I will send My terror ahead of you and throw into confusion every nation you encounter. I will make all your enemies turn and run.
Deuteronomy 9:6עֹרֶף
Understand, then, that it is not because of your righteousness that the LORD your God is giving you this good land to possess, for you are a stiff-necked people.
Joshua 7:8עֹרֶף
O Lord, what can I say, now that Israel has turned its back and run from its enemies?
2 Chronicles 29:6עֹרֶף
For our fathers were unfaithful and did evil in the sight of the LORD our God. They abandoned Him, turned their faces away from the dwelling place of the LORD, and turned their backs on Him.
Nehemiah 9:16עָרְפָּם
But they and our fathers became arrogant and stiff-necked and did not obey Your commandments.
Jeremiah 2:27עֹרֶף
say to a tree, ‘You are my father,’ and to a stone, ‘You gave me birth.’ They have turned their backs to Me and not their faces. Yet in the time of trouble, they say, ‘Rise up and save us!’

Brown-Driver-Briggs

עֹ֫רֶף n.m. back of neck, neck

Sources: Brown-Driver-Briggs (1906, public domain) from the Open Scriptures Hebrew Lexicon (CC BY 4.0), glosses from STEPBible TBESH (CC BY 4.0); STEPBible TAHOT (Hebrew Bible, Leningrad Codex, CC BY 4.0); the Berean Standard Bible (public domain). Reformatted by Word Study, wording unchanged. All sources and licenses.