Matthew 19:8

He says to them, Moses, in view of your hardheartedness, allowed you to put away your wives; but from the beginning it was not thus.

Genesis 2:24

Therefore shall a man leave his father and his mother, and cleave to his wife; and they shall become one flesh.

Genesis 7:7

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

Psalm 95:8

Harden not your heart, as at Meribah, as in the day of Massah, in the wilderness;

Jeremiah 6:16

Thus saith Jehovah: Stand in the ways and see, and ask for the ancient paths, which is the good way, and walk therein, and ye shall find rest for your souls. But they said, We will not walk therein.

Zechariah 7:12

And they made their heart as an adamant, that they should not hear the law, and the words that Jehovah of hosts sent by his Spirit by the hand of the former prophets: therefore was there great wrath from Jehovah of hosts.

Malachi 2:13-14

And further ye do this: ye cover the altar of Jehovah with tears, with weeping, and with sighing, insomuch that he regardeth not the oblation any more, nor receiveth it with satisfaction at your hand.

Matthew 3:15

But Jesus answering said to him, Suffer it now; for thus it becometh us to fulfil all righteousness. Then he suffers him.

Matthew 8:31

and the demons besought him, saying, If thou cast us out, send us away into the herd of swine.

Mark 10:5

And Jesus answering said to them, In view of your hard-heartedness he wrote this commandment for you;

1 Corinthians 7:6

But this I say, as consenting to, not as commanding it.

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
Harden not your heart, as at Meribah, as in the day of Massah, in the wilderness;
Zechariah 7:12
And they made their heart as an adamant, that they should not hear the law, and the words that Jehovah of hosts sent by his Spirit by the hand of the former prophets: therefore was there great wrath from Jehovah of hosts.
Malachi 2:13
And further ye do this: ye cover the altar of Jehovah with tears, with weeping, and with sighing, insomuch that he regardeth not the oblation any more, nor receiveth it with satisfaction at your hand.
Mark 10:5
And Jesus answering said to them, In view of your hard-heartedness he wrote this commandment for you;

Suffered

Matthew 3:15
But Jesus answering said to him, Suffer it now; for thus it becometh us to fulfil all righteousness. Then he suffers him.
Matthew 8:31
and the demons besought him, saying, If thou cast us out, send us away into the herd of swine.
1 Corinthians 7:6
But this I say, as consenting to, not as commanding it.