וַיְהִ֕י בִּשְׁמ֥וֹר יוֹאָ֖ב אֶל־הָעִ֑יר וַיִּתֵּן֙ אֶת־א֣וּרִיָּ֔ה אֶל־הַמָּקוֹם֙ אֲשֶׁ֣ר יָדַ֔ע כִּ֥י אַנְשֵׁי־חַ֖יִל שָֽׁם׃
And it came to pass, when Joab kept watch upon the city, that he assigned Uriah unto the place where he knew that valiant men were.
Read kabbalistic (mystical) interpretation of II Samuel 11:16: and classical mystical sources.