New Testament

Matthew 18:15-22

15 “If your brother sins, go and show him his fault when the two of you are alone. If he listens to you, you have regained your brother. 16 But if he does not listen, take one or two others with you, so that at the testimony of two or three witnesses every matter may be established. 17 If he refuses to listen to them, tell it to the church. If he refuses to listen to the church, treat him like a Gentile or a tax collector.

18 “I tell you the truth, whatever you bind on earth will have been bound in heaven, and whatever you release on earth will have been released in heaven. 19 Again, I tell you the truth, if two of you on earth agree about whatever you ask, my Father in heaven will do it for you. 20 For where two or three are assembled in my name, I am there among them.”

21 Then Peter came to him and said, “Lord, how many times must I forgive my brother who sins against me? As many as seven times?” 22 Jesus said to him, “Not seven times, I tell you, but seventy-seven times!

Rabbinic

Berakhot 6a

In explaining Abba Binyamin’s statement, Ravin bar Rav Adda said that Rabbi Yitzḥak said: From where is it derived that the Holy One, Blessed be He, is located in a synagogue? As it is stated: “God stands in the congregation of God; in the midst of the judges He judges”. The congregation of God is the place where people congregate to sing God’s praises, and God is located among His congregation.

And from where is it derived that ten people who pray, the Divine Presence is with them? As it is stated: “God stands in the congregation of God,” and the minimum number of people that constitute a congregation is a quorum of ten.

From where is it derived that three who sit in judgment, the Divine Presence is with them? It is derived from this same verse, as it is stated: “In the midst of the judges He judges,” and the minimum number of judges that comprises a court is three.