I Chronicles 11:7 Midrash

וַיֵּ֥שֶׁב דָּוִ֖יד בַּמְצָ֑ד עַל־כֵּ֥ן קָרְאוּ־ל֖וֹ עִ֥יר דָּוִֽיד׃

And David dwelt in the stronghold; therefore they called it the city of David.

Read midrashic interpretation of I Chronicles 11:7: and classical rabbinic exegesis.