אִ֖ישׁ כְּמַתְּנַ֣ת יָד֑וֹ כְּבִרְכַּ֛ת יְהוָ֥ה אֱלֹהֶ֖יךָ אֲשֶׁ֥ר נָֽתַן־לָֽךְ׃ (ס)
every man shall give as he is able, according to the blessing of the LORD thy God which He hath given thee.
Read midrashic interpretation of Deuteronomy 16:17: and classical rabbinic exegesis.