Mark 10:2
And the Pharisees came to him, and asked him, Is it lawful for a man to put away his wife? tempting him.
Cross-reference
Matthew 5:31 quotes the Mosaic divorce certificate law — the very law the Pharisees are testing Jesus about in Mark 10:2.
Matthew 5:32 gives Jesus' own teaching on divorce with the exception clause — a parallel to his teaching in Mark 10:2-12.
Matthew 19:3 records the same event: Pharisees testing Jesus about divorce. This is the synoptic parallel account.
Luke 11:54 says Pharisees were lying in wait to catch Jesus in something he said — exactly the same trapping motive.
John 7:32 has Pharisees sending officers to arrest Jesus — an escalation from testing to active opposition.
John 11:47 shows the council plotting to kill Jesus — the ultimate outcome of the opposition seen in Mark 10:2.
1 Corinthians 7:10 echoes Jesus' command on divorce — Paul applies the Lord's teaching to the church context.
1 Corinthians 7:11 continues Paul's teaching on divorce, adding instructions for separation — expands Jesus' teaching.
Malachi 2:16 states God hates divorce — the OT background behind the Pharisees' test. Jesus later cites Genesis instead, but this is the relevant law.
John 7:48 quotes Pharisees expressing unbelief — reflecting the same hardened rejection behind their testing.