John Trapp on Ecclesiastes 5:4

Verſ. 4. When thou voweſt a vow unto God, deferre not to pay it] See the Note on Deut. 23.21. It is in thy power to vow or not to vow. Vovere nuſquam eſt praeceptum, ſaith Bellarmine, We have no command to vow. That of David, Lib. 2. de Monac. cap. 15. Vow and perform to the Lord your God, is not purum praeceptum, ſaith Mr. Cartwright, a pure precept, but like that other, Be angry, and ſin not; where anger is not commanded, but limited. So neither are wee ſimply commanded to vow, but having voluntarily vowed, we may not deferre to pay it; delayes are taken for denials, excuſes for refuſals.

For he hath no pleaſure in fools] He needs them as little as King Achiſh did,2 Sam. 22.15 he abhors them, Pſal. 5.5. as deceitful workers, as mockers of God. Jephta in vovendo fuit ſtultus, in praeſtando impius, Jephta was a fool in vowing,Hieron. and wicked in performing. But he that vowes a thing lawful and poſſible, and yet de-deferres to perform it, or ſeeks an evaſion, is two fools for fayling; ſith