John 18:9

This was to fulfil the saying he had uttered, "I have not lost one of those whom you have given me."

John 17:12

As long as I was with them I kept them by your power which you gave me, and I protected them, and not one of them was lost (except the one who was destined to be lost), so that what the Scripture says might come true.

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
As long as I was with them I kept them by your power which you gave me, and I protected them, and not one of them was lost (except the one who was destined to be lost), so that what the Scripture says might come true.