Matthew 19:8

He says to them, Moses, because of your hard hearts, let you put away your wives: but it has not been so from the first.

Genesis 2:24

For this cause will a man go away from his father and his mother and be joined to his wife; and they will be one flesh.

Genesis 7:7

And Noah, with his sons and his wife and his sons' wives, went into the ark because of the flowing of the waters.

Psalm 95:8

Let not your hearts be hard, as at Meribah, as in the day of Massah in the waste land;

Jeremiah 6:16

This is what the Lord has said: Take your place looking out on the ways; make search for the old roads, saying, Where is the good way? and go in it that you may have rest for your souls. But they said, We will not go in it.

Zechariah 7:12

And they made their hearts like the hardest stone, so that they might not give ear to the law and the words which the Lord of armies had said by the earlier prophets: and there came great wrath from the Lord of armies.

Malachi 2:13-14

And this again you do: covering the altar of the Lord with weeping and with grief, so that he gives no more thought to the offering, and does not take it with pleasure from your hand.

Matthew 3:15

But Jesus made answer, saying to him, Let it be so now: because so it is right for us to make righteousness complete. Then he gave him baptism.

Matthew 8:31

And the evil spirits made strong prayers to him, saying, If you send us out, let us go into the herd of pigs.

Mark 10:5

But Jesus said to them, Because of your hard hearts he gave you this law.

1 Corinthians 7:6

But this I say as my opinion, and not as an order of the Lord.

Treasury of Scripture Knowledge

Summary

He saith unto them, Moses because of the hardness of your hearts suffered you to put away your wives: but from the beginning it was not so.

Bible References

Because

Psalm 95:8
Let not your hearts be hard, as at Meribah, as in the day of Massah in the waste land;
Zechariah 7:12
And they made their hearts like the hardest stone, so that they might not give ear to the law and the words which the Lord of armies had said by the earlier prophets: and there came great wrath from the Lord of armies.
Malachi 2:13
And this again you do: covering the altar of the Lord with weeping and with grief, so that he gives no more thought to the offering, and does not take it with pleasure from your hand.
Mark 10:5
But Jesus said to them, Because of your hard hearts he gave you this law.

Suffered

Matthew 3:15
But Jesus made answer, saying to him, Let it be so now: because so it is right for us to make righteousness complete. Then he gave him baptism.
Matthew 8:31
And the evil spirits made strong prayers to him, saying, If you send us out, let us go into the herd of pigs.
1 Corinthians 7:6
But this I say as my opinion, and not as an order of the Lord.

Basic English, produced by Mr C. K. Ogden of the Orthological Institute - public domain