וַיִּקְרָ֣א יַ֠עְבֵּץ לֵאלֹהֵ֨י יִשְׂרָאֵ֜ל לֵאמֹ֗ר אִם־בָּרֵ֨ךְ תְּבָרֲכֵ֜נִי וְהִרְבִּ֤יתָ אֶת־גְּבוּלִי֙ וְהָיְתָ֤ה יָדְךָ֙ עִמִּ֔י וְעָשִׂ֥יתָ מֵּרָעָ֖ה לְבִלְתִּ֣י עָצְבִּ֑י וַיָּבֵ֥א אֱלֹהִ֖ים אֵ֥ת אֲשֶׁר־שָׁאָֽל׃
雅比斯向以色列的上帝呼求說：«你若真的賜福給我，擴張我的地界，你的手與我同在，保守我遠離災禍，不讓我受痛苦——»上帝就賜給他所求的。
Rashi
and Your hand is with me that You save me from harm if You will be with me and save me from harm. so as not to grieve me that no injury, pain, or sadness befall me, and he vowed whatever he vowed.
Rashi
and God fulfilled that which he had requested and he paid his vow. From here proof is brought that when people subscribe to a charity (in public) for a certain cause, they should not vow but give without a vow. Its midrashic interpretation is well known.