English Standard Version
So they said to him, “Then what sign do you do, that we may see and believe you? What work do you perform?

American Standard Version
They said therefore unto him, What then doest thou for a sign, that we may see, and believe thee? what workest thou?

Berean Study Bible
So they asked Him, “What sign then will You perform, so that we may see it and believe You? What will You do?

Douay-Rheims Bible
They said therefore to him: What sign therefore dost thou shew, that we may see, and may believe thee? What dost thou work?

English Revised Version
They said therefore unto him, What then doest thou for a sign, that we may see, and believe thee? what workest thou?

King James Bible
They said therefore unto him, What sign shewest thou then, that we may see, and believe thee? what dost thou work?

World English Bible
They said therefore to him, "What then do you do for a sign, that we may see, and believe you? What work do you do?

Young's Literal Translation
They said therefore to him, 'What sign, then, dost thou, that we may see and may believe thee? what dost thou work?

John 6:30 Additional Translations ...