“Abraham also ran to the herd, and took a tender and choice calf and gave it to the servant, and he hurried to prepare it. He took curds and milk and the calf which he had prepared, and placed it before them; and he was standing by them under the tree as they ate.” Gen. 18:7-8
Most Christians may not catch this, but a Jew would: To eat meat and dairy together is against Jewish law. They believe this from their understanding of the statement “…You are not to boil a young goat in the milk of its mother.” which is found among the laws given in Exodus 23:19 and 34:26, and yet again in Deuteronomy 14:21. One potential explanation in keeping with the law would be that the dairy was served first, and at some point later, the meat (Daas Zekeinim).
According to Rashi, the spiritual messengers cannot physically eat this meal, but make it seem as though they do. In the case they were able to physically eat of it, it would not be a violation of dietary law, as this law does not exist yet. It is fascinating to note however how many elements of Abraham’s life would eventually work their way into the future of the Jewish people.