Exodus 12:11מָתְנֵיכֶם
This is how you are to eat it: You must be fully dressed for travel, with your sandals on your feet and your staff in your hand. You are to eat in haste; it is the LORD’s Passover.
1 Kings 2:5בְּמָתְנָיו
Moreover, you know what Joab son of Zeruiah did to me—what he did to Abner son of Ner and Amasa son of Jether, the two commanders of the armies of Israel. He killed them in peacetime to avenge the blood of war. He stained with the blood of war the belt around his waist and the sandals on his feet.
2 Kings 1:8בְּמָתְנָיו
“He was a hairy man,” they answered, “with a leather belt around his waist.” “It was Elijah the Tishbite,” said the king.
Isaiah 11:5מָתְנָיו
Righteousness will be the belt around His hips, and faithfulness the sash around His waist.
Jeremiah 1:17מָתְנֶיךָ
Get yourself ready. Stand up and tell them everything that I command you. Do not be intimidated by them, or I will terrify you before them.
Ezekiel 1:27מָתְנָיו
From what seemed to be His waist up, I saw a gleam like amber, with what looked like fire within it all around. And from what seemed to be His waist down, I saw what looked like fire; and brilliant light surrounded Him.

Brown-Driver-Briggs

מַתְנַ֫יִם n.m.du. loins

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.