is the work of God, that you believe in Him whom He sent." () "What sign will You perform then, that we may see it and believe You? What work will You do? Our fathers ate the manna in the desert; as it is written, 'He gave them bread from heaven to eat. () "Most assuredly, I say to you, Moses did not give you the bread from heaven, but My Father gives you the true bread from heaven. For the bread of God is He who comes down from heaven and gives life to the world." () "Lord (or Sir) (), give us this bread always." () The link between toil or painful labour (sorrow in the King James Version, travail in the Wycliffe Bible) and obtaining food was established in and the writer of Ecclesiastes observed that "all the labour of man is for his mouth, and yet the appetite is not filled" (). William Robertson Nicoll noted in the Expositor's Greek Testament that even "the food which [Jesus] had given them the evening before He called 'food which perishes' (): they were already hungry again, and had toiled after Him for miles to get another meal". Instead Jesus promises a different type of food which his hearers should work for: the food which endures to everlasting life (). Many English translations state that Jesus (the Son of Man) will provide the food which endures, but there are variant translations which suggest that the gift Jesus refers to is eternal life, rather than imperishable food. Thus the Living Bible's paraphrase reads: In the same verse, the evangelist refers again to the concept of a seal () which he has previously mentioned in . John the Baptist declared that those who would accept the testimony of Jesus would thereby certify () that God is true; Jesus here declares that God the Father has set His seal () on Himself. The reformer John Calvin wrote of this declaration: The distinction between "works" () and "work" () in verses 28-29 provides one of the scriptural foundations for the Protestant doctrine, Sola fide ("faith alone"). Theologian Heinrich August Wilhelm Meyer commented: The dialogue ends with the Jews asking Jesus, "Lord (or Sir) (), give us this bread always" (). The Voice translation renders 'κυριε' as 'Master', while Plummer argues that: In reply, Jesus makes a declaration: Coming to Jesus is equated to