Bible Verses About Travellers: Tesserae hospitales or pledges of hospitality, alluded to

Let him that hath an eare, heare what the Spirite saith vnto the Churches. To him that ouercommeth, will I giue to eate of the Manna that is hid, and will giue him a white stone, and in the stone a newe name written, which no man knoweth sauing he that receiueth it.