to take a vow of abstinence / to refrain from / abstain from
Figuratively: He decreed upon himself to do something or to refrain from a certain action.
("And her father heard her vow, and her bond with which she bound her soul, and her father held his peace at her; then all her vows shall stand" - Numbers 30:5)
Translation
Expression (Hebrew)
אָסַר עַל נַפְשׁוֹ
Definition (Hebrew)
בִּמְלִיצָה: גָּזַר עַל עַצְמוֹ לַעֲשׂוֹת מַשֶּׁהוּ אוֹ לְהִמָּנַע מִמַּעֲשֶׂה מְסֻיָּם.
("וְשָׁמַע אָבִיהָ אֶת נִדְרָהּ וֶאֱסָרָהּ אֲשֶׁר אָסְרָה עַל נַפְשָׁהּ וְהֶחֱרִישׁ לָהּ אָבִיהָ וְקָמוּ כָּל נְדָרֶיהָ" - בַּמִּדְבָּר ל ה)