Genesis 21:24
And Abraham said, I, will swear.
Genesis 14:13
Then came in a fugitive, and told Abram the Hebrew, - he, having his dwelling among the oaks of Mature the Amorite brother of Eshcol and brother of Aner, they, also having a covenant with Abram.
Romans 12:18
If possible - so far as dependeth on you, with all men being at peace:
Hebrews 6:16
For, men, by the greater one, swear, and, with them, an end of all gainsaying by way of confirmation is, the oath:
Treasury of Scripture Knowledge
Summary
                            And Abraham said, I will swear.                        
                    General references
Bible References
General references
                                        Genesis 14:13                                        
                                                                                                                                Then came in a fugitive, and told Abram the Hebrew, - he, having his dwelling among the oaks of Mature the Amorite brother of Eshcol and brother of Aner, they, also having a covenant with Abram.
                                    
                                        Romans 12:18                                        
                                                                                                                                If possible - so far as dependeth on you, with all men being at peace:
                                    
                                        Hebrews 6:16                                        
                                                            
                        For, men, by the greater one, swear, and, with them, an end of all gainsaying by way of confirmation is, the oath: