John 15:13
"Greater love hath no man than this, that a man lay down his life for his friends."
Cross References (ranked by relevance)
John 10:11
95
I am the good shepherd: the good shepherd giveth his life for the sheep.
Ephesians 5:2
74
And walk in love, as Christ also hath loved us, and hath given himself for us an offering and a sacrifice to God for a sweetsmelling savour.
John 10:15
54
As the Father knoweth me, even so know I the Father: and I lay down my life for the sheep.