1 I am coming this third time to you: by the mouth of two or three witnesses, every matter shall be established.
2 Corinthians 13:1 Cross References - Living_Oracles
Matthew 18:16
16 but if he will not hear, take one or two along with you, that by the testimony of two or three witnesses everything may be ascertained.
Matthew 26:60-61
John 8:17-18
2 Corinthians 12:14
14 Behold, a third time I am ready to come to you, and I will not be burdensome to you; because I seek not yours, but you: for the children ought not to lay up for the parents, but the parents for the children.
Hebrews 10:28-29
28 Any one who disregarded the law of Moses, died without mercy, by two or three witnesses.
29 Of how much sorer punishment, think you, shall he be counted worthy, who has trampled under foot the Son of God, and reckoned the blood of the institution by which he was sanctified, a common thing, and has insulted the Spirit of Favor?