נָת֤וֹן תִּתֵּן֙ ל֔וֹ וְלֹא־יֵרַ֥ע לְבָבְךָ֖ בְּתִתְּךָ֣ ל֑וֹ כִּ֞י בִּגְלַ֣ל ׀ הַדָּבָ֣ר הַזֶּ֗ה יְבָרֶכְךָ֙ יְהוָ֣ה אֱלֹהֶ֔יךָ בְּכָֽל־מַעֲשֶׂ֔ךָ וּבְכֹ֖ל מִשְׁלַ֥ח יָדֶֽךָ׃
Engkau harus benar-benar memberi kepadanya, dan janganlah hatimu merasa berat ketika engkau memberi kepadanya, sebab karena hal inilah Yang Mahakekal, Allahmu, akan memberkati engkau dalam segala pekerjaanmu dan dalam segala usaha tanganmu.
Rashi
נתן תתן לו THOU SHALT SURELY GIVE HIM — even hundred times (Sifrei Devarim 117:6).
Chizkuni
ולא ירע לבבך בתתך לו, “not only are you not to refuse a loan but you must not extend a loan reluctantly;” the Torah warns you not to think that you will suffer economic hardship for having been goodhearted. G-d promises that He will bless you for your good heartedness.
Ibn Ezra
on account of [literally: “in rolling over”] i.e., “for the reason of” [literally: “in turning over”]. Compare “to turn this matter the other way” [II Samuel 14: 20]. The reason behind this verse’s assertion is that all of our individual bodies are nothing more than parts of an integrated Whole.