John 13:25

He, leaning back thus on Jesus’ bosom, *said to Him, “Lord, who is it?”

John 21:20

Peter, turning around, *saw the disciple whom Jesus loved following them; the one who also had leaned back on His bosom at the supper and said, “Lord, who is the one who betrays You?”

Genesis 44:4-12

They had just gone out of the city, and were not far off, when Joseph said to his house steward, “Up, follow the men; and when you overtake them, say to them, ‘Why have you repaid evil for good?

Esther 7:5

Then King Ahasuerus asked Queen Esther, “Who is he, and where is he, who would presume to do thus?”

Treasury of Scripture Knowledge

Summary

He then lying on Jesus' breast saith unto him, Lord, who is it?

General references

Bible References

Who

Genesis 44:4
They had just gone out of the city, and were not far off, when Joseph said to his house steward, “Up, follow the men; and when you overtake them, say to them, ‘Why have you repaid evil for good?
Esther 7:5
Then King Ahasuerus asked Queen Esther, “Who is he, and where is he, who would presume to do thus?”

General references

Matthew 26:22
Being deeply grieved, they each one began to say to Him, “Surely not I, Lord?”
Luke 22:23
And they began to discuss among themselves which one of them it might be who was going to do this thing.