'Visitor' in the Bible

"No resident alien is to eat anything sacred. Neither the visitor of the priest nor a hired laborer is to eat anything sacred.

The angel of the LORD did not appear again to Manoah or to his wife, and then Manoah knew confidently that the visitor had been the angel of the LORD.

And a visitor came to the rich man, but he {was reluctant} to take from his flocks or from his herds to prepare a meal for the traveler when he came to him. So he took the ewe lamb of the poor man and prepared it for the man who had come to him."