Rashi on Genesis 22:4/רש"י על בראשית כ״ב:ד׳

1ביום השלישי ON THE THIRD DAY — Why did God delay and not show it to him at once? So that people should not say, “He confused and confounded him suddenly and bewildered his mind. If, however, he had had time for consideration, he would not have obeyed” (Midrash Tanchuma, Vayera 22).

2וירא את המקום AND HE SAW THE PLACE — He saw a cloud lowering over the mountain (Genesis Rabbah 56:1).