תַּעְתִּ֣יר אֵ֭לָיו וְיִשְׁמָעֶ֑ךָּ וּנְדָרֶ֥יךָ תְשַׁלֵּֽם׃
Thou shalt make thy prayer unto Him, and He will hear thee, And thou shalt pay thy vows;
Rashi on Job
and you will pay your wows You will be confident that your sacrifices, the payments of your vows, will be accepted.
Malbim on Job
When a person's devotion to God is so great that his only wish is to cleave to Him, with no expectation of material or bodily benefit, the Divine Presence attends and hearkens to his prayers.