כִּֽי־תִדֹּ֥ר נֶ֙דֶר֙ לַיהוָ֣ה אֱלֹהֶ֔יךָ לֹ֥א תְאַחֵ֖ר לְשַׁלְּמ֑וֹ כִּֽי־דָּרֹ֨שׁ יִדְרְשֶׁ֜נּוּ יְהוָ֤ה אֱלֹהֶ֙יךָ֙ מֵֽעִמָּ֔ךְ וְהָיָ֥ה בְךָ֖ חֵֽטְא׃
When thou shalt vow a vow unto the LORD thy God, thou shalt not be slack to pay it; for the LORD thy God will surely require it of thee; and it will be sin in thee.
Targum Jonathan on Deuteronomy
When you vow a vow before the Lord your God, delay not to fulfil it in (one of) the three festivals; for the Lord your God requiring will require it. And in the oblation there shall not be any fault or blemish, for in the prescription of the Lord of the world it is so ordained. And thou shalt not be guilty of keeping back (delaying) thy vow: