Hebrews 12:11

No discipline is pleasant at the time; on the contrary, it is painful. But afterwards its fruit is seen in the peacefulness of a righteous life which is the lot of those who have been trained under it.

Matthew 10:37

He who loves father or mother more than me is not worthy of me; and he who loves son or daughter more than me is not worthy of me.

Treasury of Scripture Knowledge

Summary

And the thing was very grievous in Abraham's sight because of his son.

Bible References

Because

Matthew 10:37
He who loves father or mother more than me is not worthy of me; and he who loves son or daughter more than me is not worthy of me.
Hebrews 12:11
No discipline is pleasant at the time; on the contrary, it is painful. But afterwards its fruit is seen in the peacefulness of a righteous life which is the lot of those who have been trained under it.