But let your ‘Yes’ be ‘Yes,’ and your ‘No,’ ‘No.’ For whatever is more than these is from the evil one.
Matthew 5:37

But I say to you that for every idle word men may speak, they will give account of it in the day of judgment.
For by your words you will be justified, and by your words you will be condemned.
Matthew 12:36-37

Those who sow in tears Shall reap in joy.
He who continually goes forth weeping, Bearing seed for sowing, Shall doubtless come again with rejoicing, Bringing his sheaves with him.
Psalms 126:5-6