“ Yet there is both straw and provender for our asses, and there is bread and wine also for me, and for your handmaid, and for the young man who is with your servants. There is no lack of anything.”
There was no reason for the lack of hospitality for they had all their provisions with them. All they needed was a bed for the night. This was said mainly to persuade the old man to help them. It would be at no cost to him. For the laws of hospitality would usually mean provision for a guest.
“With your servants.” That is, with me and my handmaid. ‘Your servants' and ‘your handmaid' are polite expressions, a submission which he would not expect would be acted on.