Cross reference
Jeremiah 32:11
11 So I took the evidence of the purchase, both that which was sealed according to the law and custom, and that which was open:
Luke 2:27
27 And he came by the Spirit into the temple: and when the parents brought in the child Jesus, to do for him after the custom of the law,
Acts 26:3
3 Especially because I know thee to be expert in all customs and questions which are among the Jews: wherefore I beseech thee to hear me patiently.
1 Corinthians 11:16
16 But if any man seem to be contentious, we have no such custom, neither the churches of God.