C. F. Keil and Franz Delitzsch on Genesis 18:6-8

Gen 18:6-8

When the three men had accepted the hospitable invitation, Abraham, just like a Bedouin sheikh of the present day, directed his wife to take three seahs (374 cubic inches each) of fine meal, and back cakes of it as quickly as possible (עגּות round unleavened cakes baked upon hot stones); he also had a tender calf killed, and sent for milk and butter, or curdled milk, and thus prepared a bountiful and savoury meal, of which the guests partook. The eating of material food on the part of these heavenly beings was not in appearance only, but was really eating; an act which may be attributed to the corporeality assumed, and is to be regarded as analogous to the eating on the part of the risen and glorified Christ (Luk 24:41.), although the miracle still remains physiologically incomprehensible.