"You have the words of everlasting life"

In John 6 when the Jews abandoned Jesus, he turned to his disciples and said "Will you also leave me?" Peter turned to him and responded "Lord, to whom shall we go, You have the Words of Everlasting Life".

This was always taught to me as a Protestant to mean that we had to listen to God's word in the New Testament and that through those we could enter Heaven. That is true, but it also avoids the immediate context of these words. What specific words did Jesus say that were the "words of everlasting life"?

"Unless you eat my body and drink my blood you cannot enter the Kingdom of Heaven"

"Amen Amen I say to you, Unless you eat my body and drink my blood you cannot enter into Heaven"

I think it's pretty self explanatory.