Jn 3:16, Rom 8:32, 1 Jn 4:9-10, Mt 3:16-17, Lk 3:21-22
God told Abraham to sacrifice Isaac, Abraham's only son, as a burnt offering. (Gen 22:1-2)
Gen 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. 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.
Jesus is the only begotten Son of God. (Matthew 3:16-17, Luke 3:21-22)
Matthew 3:16 And Jesus, when he was baptized, went up straightway out of the water: and, lo, the heavens were opened unto him, and he saw the Spirit of God descending like a dove, and lighting upon him: 17 And lo a voice from heaven, saying, This is my beloved Son, in whom I am well pleased.
Luke 3:21 Now when all the people were baptized, it came to pass, that Jesus also being baptized, and praying, the heaven was opened, 22 And the Holy Ghost descended in a bodily shape like a dove upon him, and a voice came from heaven, which said, Thou art my beloved Son; in thee I am well pleased.
God killed His only begotten Son to save us. (John 3:16, Romans 8:32, 1 John 4:9-10)
John 3:16 For God so loved the world, that he gave his only begotten Son, that whosoever believeth in him should not perish, but have everlasting life.
Romans 8:32 He that spared not his own Son, but delivered him up for us all, how shall he not with him also freely give us all things?
1 John 4:9 In this was manifested the love of God toward us, because that God sent his only begotten Son into the world, that we might live through him. 10 Herein is love, not that we loved God, but that he loved us, and sent his Son to be the propitiation for our sins.