כִּ֤י ט֣וֹב סַ֭חְרָהּ מִסְּחַר־כָּ֑סֶף וּ֝מֵחָר֗וּץ תְּבוּאָתָֽהּ׃
װאָרום איר סחורה איז בעסער װי סחורה פֿון זילבער, און מער װי גינגאָלד איר אײַנקום.
Rashi
for its commerce is better than the commerce of silver In any exchange, when a person exchanges [something] for merchandise, this one takes this, and that one takes that; but if one says to his friend, “Teach me your chapter, and I will teach you my chapter,” [then] both chapters are found in the hand of each of them.