John 9:36

He answered, "Who is he, sir? [Tell me], so I can believe in him."

Romans 10:14

[But] how can they appeal to Him if they have not [first] believed in Him? And how can they believe in Him if they have not [first] heard [about Him]? And how can they hear [about Him] if there is no preacher?

Matthew 11:3

and said to Jesus, "Are you the One who was to come, or should we look for someone else?"

John 1:38

Then Jesus turned and saw them following [Him] and said to them, "What are you looking for?" And they answered Him, "Rabbi (which means Teacher), where are you staying?"

Treasury of Scripture Knowledge

Summary

He answered and said, Who is he, Lord, that I might believe on him?

Bible References

Who

John 1:38
Then Jesus turned and saw them following [Him] and said to them, "What are you looking for?" And they answered Him, "Rabbi (which means Teacher), where are you staying?"
Matthew 11:3
and said to Jesus, "Are you the One who was to come, or should we look for someone else?"