Ezekiel 33:2 Midrash

בֶּן־אָדָ֗ם דַּבֵּ֤ר אֶל־בְּנֵֽי־עַמְּךָ֙ וְאָמַרְתָּ֣ אֲלֵיהֶ֔ם אֶ֕רֶץ כִּֽי־אָבִ֥יא עָלֶ֖יהָ חָ֑רֶב וְלָקְח֨וּ עַם־הָאָ֜רֶץ אִ֤ישׁ אֶחָד֙ מִקְצֵיהֶ֔ם וְנָתְנ֥וּ אֹת֛וֹ לָהֶ֖ם לְצֹפֶֽה׃

’Son of man, speak to the children of thy people, and say unto them: When I bring the sword upon a land, if the people of the land take a man from among them, and set him for their watchman;