Commentary for II Samuel 8:2

וַיַּ֣ךְ אֶת־מוֹאָ֗ב וַֽיְמַדְּדֵ֤ם בַּחֶ֙בֶל֙ הַשְׁכֵּ֣ב אוֹתָ֣ם אַ֔רְצָה וַיְמַדֵּ֤ד שְׁנֵֽי־חֲבָלִים֙ לְהָמִ֔ית וּמְלֹ֥א הַחֶ֖בֶל לְהַחֲי֑וֹת וַתְּהִ֤י מוֹאָב֙ לְדָוִ֔ד לַעֲבָדִ֖ים נֹשְׂאֵ֥י מִנְחָֽה׃

And he smote Moab, and measured them with the line, making them to lie down on the ground; and he measured two lines to put to death, and one full line to keep alive. And the Moabites became servants to David, and brought presents.

Rashi on II Samuel