Instances of
Hanani - was put in charge because he was a man of integrity - Nehemiah 7:2
Israel - did not inquire of the LORD before they made a treaty of peace - Joshua 9:15
Men in the boat with Jonah - made vows to God - Jonah 1:16
Paul to Felix - "What I am saying is true and reasonable" - Acts 26:25
Oath
A person taking a thoughtless oath he will be guilty - Leviticus 5:4
He who keeps his oath even when it hurts will never be shaken - Psalms 15:4
Speaking the truth
Let you yes be yes, no be no - James 5:12
Speaking the Truth
Let you yes be yes, no be no - other is from the evil one - Matthew 5:37
Lord is near to all who call on him in truth - Psalms 145:18
Love rejoices with the truth - 1 Corinthians 13:6
Must not break your word but must do everything you said - Numbers 30:1, 2
Truth should be loved - 2 Thessalonians 2:9, 10
Worship in spirit and in truth - John 4:23
Vows
It is better not to vow than to make a vow and not fulfill it - Ecclesiastes 5:5