Rashi on Genesis 7:13/רש"י על בראשית ז׳:י״ג

1בעצם היום הזה IN THE SELFSAME DAY — Scripture teaches you that the people of his generation said: “If we see him enter the Ark we will smash it up and kill him”. The Holy One, blessed be He, thereupon said, ‘‘I will let him enter before the eyes of everyone and we shall see whose word prevails” (Genesis Rabbah 32:8).