51 Keep thy foot when thou goest to the house of God; for to draw nigh to hear is better than to give the sacrifice of fools: for they know not that they do evil. 2 Be not rash with thy mouth, and let not thy heart be hasty to utter anything before God; for God is in heaven, and thou upon earth: therefore let thy words be few. 3 For a dream cometh with a multitude of business, and a fool's voice with a multitude of words.
4 When thou vowest a vow unto God, defer not to pay it; for he hath no pleasure in fools: pay that which thou vowest. 5 Better is it that thou shouldest not vow, than that thou shouldest vow and not pay. 6 Suffer not thy mouth to cause thy flesh to sin; neither say thou before the angel, that is was an error: wherefore should God be angry at thy voice, and destroy the work of thy hands?
Matthew Henry's Commentary on Ecclesiastes 5:1-6
Commentary on Ecclesiastes 5:1-3
(Read Ecclesiastes 5:1-3)
Address thyself to the worship of God, and take time to compose thyself for it. Keep thy thoughts from roving and wandering: keep thy affections from running out toward wrong objects. We should avoid vain repetitions; copious prayers are not here condemned, but those that are unmeaning. How often our wandering thoughts render attendance on Divine ordinances little better than the sacrifice of fools! Many words and hasty ones, used in prayer, show folly in the heart, low thoughts of God, and careless thoughts of our own souls.
Commentary on Ecclesiastes 5:4-8
(Read Ecclesiastes 5:4-8)
When a person made engagements rashly, he suffered his mouth to cause his flesh to sin. The case supposes a man coming to the priest, and pretending that his vow was made rashly, and that it would be wrong to fulfil it. Such mockery of God would bring the Divine displeasure, which might blast what was thus unduly kept. We are to keep down the fear of man. Set God before thee; then, if thou seest the oppression of the poor, thou wilt not find fault with Divine Providence; nor think the worse of the institution of magistracy, when thou seest the ends of it thus perverted; nor of religion, when thou seest it will not secure men from suffering wrong. But though oppressors may be secure, God will reckon for all.