Mark 10:4

They replied, "Moses allowed us to provide a legal divorce decree and [then] to divorce her."

Matthew 1:19

Now Joseph, her husband [to be], being a man who did what was right, and not wanting to make a public spectacle out of her, decided to break off their engagement privately.

Matthew 5:31-32

It was also said [Deut. 24:1-3], 'Whoever divorces his wife, let it be done with a [legally binding] divorce decree, which he must give her.'

Matthew 19:7

They replied, "Why then did Moses order [a man] to provide a legal divorce decree [Deut. 24:1], and then divorce his wife?"

Treasury of Scripture Knowledge

Summary

And they said, Moses suffered to write a bill of divorcement, and to put her away.

Bible References

General references

Matthew 1:19
Now Joseph, her husband [to be], being a man who did what was right, and not wanting to make a public spectacle out of her, decided to break off their engagement privately.
Matthew 5:31
It was also said [Deut. 24:1-3], 'Whoever divorces his wife, let it be done with a [legally binding] divorce decree, which he must give her.'
Matthew 19:7
They replied, "Why then did Moses order [a man] to provide a legal divorce decree [Deut. 24:1], and then divorce his wife?"