ASV: Jesus answered and said unto them, This is the work of God, that ye believe on him whom he hath sent.

BBE: Jesus, answering, said to them, This is to do the work of God: to have faith in him whom God has sent.

DBY: Jesus answered and said to them, This is the work of God, that ye believe on him whom he has sent.

KJV: Jesus answered and said unto them, This is the work of God, that ye believe on him whom he hath sent.

WEY: "This," replied Jesus, "is above all the thing that God requires--that you should be believers in Him whom He has sent."

WBS: Jesus answered and said to them, This is the work of God, that ye believe on him whom he hath sent.

WEB: Jesus answered them, "This is the work of God, that you believe in him whom he has sent."

YLT: Jesus answered and said to them, 'This is the work of God, that ye may believe in him whom He did send.'
