In spite of the lavish hospitality practiced in the house of Abraham, it happened once that a poor man, or rather an alleged poor man, was turned away empty-handed, and this was the immediate reason for the last of Abraham's temptations, the sacrifice of his favorite son Isaac. It was the day on which Abraham celebrated the birth of Isaac with a great banquet, to which all the magnates of the time were bidden with their wives. Satan, who always appears at a feast in which no poor people participate, and keeps aloof from those to which poor guests are invited, turned up at Abraham's banquet in the guise of a beggar asking alms at the door. He had noticed that Abraham had invited no poor man, and he knew that his house was the right place for him.