On Friday and the Fall of Man

St. Irenaeus of Lyons died ca. 202

Thus, then, in the day that they ate, in the same did they die, and became death’s debtors, since it was one day of the creation. For it is said, There was made in the evening, and there was made in the morning, one day. Now in this same day that they ate, in that also did they die. But according to the cycle and progress of the days, after which one is termed first, another second, and another third, if anybody seeks diligently to learn upon what day out of the seven it was that Adam died, he will find it by examining the dispensation of the Lord. For by summing up in Himself the whole human race from the beginning to the end, He has also summed up its death. From this it is clear that the Lord suffered death, in obedience to His Father, upon that day on which Adam died while he disobeyed God. Now he died on the same day in which he ate. For God said, In that day on which you shall eat of it, you shall die by death. The Lord, therefore, recapitulating in Himself this day, underwent His sufferings upon the day preceding the Sabbath, that is, the sixth day of the creation, on which day man was created; thus granting him a second creation by means of His passion, which is that [creation] out of death. (Against Heresies Book V. 23.2)