Ecclesiastes 5:5-7

Living Bible

⁵ It is far better not to say you’ll do something than to say you will and then not do it. ^6-7 In that case, your mouth is making you sin. Don’t try to defend yourself by telling the messenger from God that it was all a mistake to make the vow.^[a] That would make God very angry; and he might destroy your prosperity. Dreaming instead of doing is foolishness, and there is ruin in a flood of empty words; fear God instead.