Mark 10:5

Jesus said to them, "He wrote you that command on account of the hardness of your hearts.

Matthew 19:8

He said to them, "Moses permitted you to divorce your wives, on account of the hardness of your hearts, but it was not so from the beginning.

Acts 7:51

Stiff-necked, uncircumcised in heart and ear, you are always resisting the holy Spirit! As with your fathers, so with you!

Hebrews 3:7-10

Therefore, as the holy Spirit says, To-day, when you hear his voice,

Treasury of Scripture Knowledge

Summary

And Jesus answered and said unto them, For the hardness of your heart he wrote you this precept.

Bible References

For

Matthew 19:8
He said to them, "Moses permitted you to divorce your wives, on account of the hardness of your hearts, but it was not so from the beginning.
Acts 7:51
Stiff-necked, uncircumcised in heart and ear, you are always resisting the holy Spirit! As with your fathers, so with you!
Hebrews 3:7
Therefore, as the holy Spirit says, To-day, when you hear his voice,