לֹא־תָלִ֨ין נִבְלָת֜וֹ עַל־הָעֵ֗ץ כִּֽי־קָב֤וֹר תִּקְבְּרֶ֙נּוּ֙ בַּיּ֣וֹם הַה֔וּא כִּֽי־קִלְלַ֥ת אֱלֹהִ֖ים תָּל֑וּי וְלֹ֤א תְטַמֵּא֙ אֶת־אַדְמָ֣תְךָ֔ אֲשֶׁר֙ יְהוָ֣ה אֱלֹהֶ֔יךָ נֹתֵ֥ן לְךָ֖ נַחֲלָֽה׃ (ס)
his body shall not remain all night upon the tree, but thou shalt surely bury him the same day; for he that is hanged is a reproach unto God; that thou defile not thy land which the LORD thy God giveth thee for an inheritance.
Shaarei Teshuvah
“You must not leave over his corpse on the stake overnight” (Deuteronomy 21:23). One who leaves over his dead [relative] overnight transgresses a negative commandment, unless he leaves him over for [the sake of] his honor.”