When thou vowest a vow unto God - Hasty words in prayer (Ecc 5:2, Ecc 5:3) suggest the subject of hasty vows. A vow should not be hastily made (Jdg 11:35; 1Sa 14:24). When made, it must be kept (Psa 76:11), even as God keeps His word to us (Exo 12:41, Exo 12:51; Jos 21:45).