וירא אליו ד' באלני ממרא והוא ישב פתח האהל כחם היום
It was three days after Avraham Avinu’s bris milah, circumcision. The third day is the most painful. Yet, our Patriarch was sitting at the entrance of his tent during an unusually warm time of the day. Chazal teach that Hashem removed the sun from its protective casing in order to make it more powerful (and hotter), so that wayfarers would not travel. Thus, they would not inconvenience Avraham (by not creating an opportunity for him to serve them). When Hashem saw that Avraham was actually pained by not having the opportunity to fulfill the mitzvah of hachnosas orchim, welcoming guests,…