5 And Jesus answered and said to them: On account of the hardness of your hearts, he wrote this commandment for you.
Mark 10:5 Cross References - Anderson
Matthew 19:8
8 He said to them: Moses, on account of the hardness of your hearts, permitted you to put away your wives; but from the beginning it was not so.
Acts 7:51
51 You stiff-necked, and uncircumcised in heart and in ears, you do always resist the Holy Spirit; as your fathers did, so also do you.
Hebrews 3:7-10
7 Wherefore, as the Holy Spirit says: To-day, if you will hear his voice,
8 harden not your hearts, as in the bitter provocation, in the day of trial in the wilderness,
9 where your fathers tried me, proved me, and saw my works forty years.
10 Where fore, I was angry with that generation, and said, They do always err in their heart, and they have not known my ways: