because
Genesis 17:18
And Abraham said unto God, O that Ishmael might live before thee!
Genesis 22:1
And it came to pass after these things, that God did tempt Abraham, and said unto him, Abraham: and he said, Behold, here I am.
Genesis 22:2
And he said, Take now thy son, thine only son Isaac, whom thou lovest, and get thee into the land of Moriah; and offer him there for a burnt offering upon one of the mountains which I will tell thee of.
2 Samuel 18:33
And the king was much moved, and went up to the chamber over the gate, and wept: and as he went, thus he said, O my son Absalom, my son, my son Absalom! would God I had died for thee, O Absalom, my son, my son!
Matthew 10:37
He that loveth father or mother more than me is not worthy of me: and he that loveth son or daughter more than me is not worthy of me.
Hebrews 12:11
Now no chastening for the present seemeth to be joyous, but grievous: nevertheless afterward it yieldeth the peaceable fruit of righteousness unto them which are exercised thereby.