Plowed on his back
Figuratively: used him or took advantage of him; learned or experimented at his expense.
("Upon my back the plowers plowed; they made their furrows long" - Psalms 129:3)
Translation
Expression (Hebrew)
חָרַשׁ עַל גַּבּוֹ
Definition (Hebrew)
בְּהַשְׁאָלָה: נִיצֵּל אוֹתוֹ. הִתְלַמֵּד אוֹ הִתְנַסָּה עַל חֶשְׁבּוֹנוֹ.
("עַל גַּבִּי חָרְשׁוּ חֹרְשִׁים הֶאֱרִיכוּ לְמֵעַנּוֹתָם לְמַעֲנִיתָם"- תְּהִלִּים קכט ג)