John 18:9

He made this request in order that the words He had spoken might be fulfilled, "As for those whom Thou hast given me, I have not lost one."

John 17:12

While I was with them, I kept them true to Thy name--the name Thou hast given me to bear--and I kept watch over them, and not one of them is lost but only he who is doomed to destruction--that the Scripture may be fulfilled.

Treasury of Scripture Knowledge

Summary

That the saying might be fulfilled, which he spake, Of them which thou gavest me have I lost none.

Bible References

Of

John 17:12
While I was with them, I kept them true to Thy name--the name Thou hast given me to bear--and I kept watch over them, and not one of them is lost but only he who is doomed to destruction--that the Scripture may be fulfilled.