Ecclesiastes 5:4-6

Matthew(i) 4 If thou make a vowe vnto God, be not slacke to perfourme it. As for folish vowes, he hath no pleasure in them. 5 If thou promise any thynge, paye it: for better it is that thou make no vowe then that thou shouldest promyse, and not paye. 6 Vse not thy mouth to cause thy flesh for to synne, that thou say not before the aungell: my foolishnesse is in the faute. For then God will be angry at thy voyce, & destroye all the workes of thyne handes.