Tafsiran Kejadian 7:4: Rashi, Chizkuni, Kitzur Ba'al HaTurim & Radak

כי לימים עוד שבעה FOR YET SEVEN DAYS — These are the seven days of mourning for the righteous man Methuselah for whose honour the Holy One, blessed be He, had regard, and therefore postponed punishment. Go and calculate the years of Methuselah and you will find that they came to an end (i. e. he died) in the six hundredth year of Noah’s life (which coincided with the date of the Flood) (Sanhedrin 108b).

ארבעים יום וארבעים לילה, “forty days and forty nights, consecutively.” The number of days, i.e. forty, corresponds to the number of lashes administered to people who have deliberately violated G-d’s negative commandments. (Deut. 25,3) Alternately, the number is reminiscent of the 40 days during which Moses received the Torah from G-d while he was on Mount Sinai.

היקום אשר עשיתי "existence that I created" in Gematria "No life to the resurrection."

כי לימים עוד FOR YET [SEVEN] DAYS — What is meant by עוד "yet", "more"? A further period of time: this period (seven days) additional to the 120 years of respite that was promised (Sanhedrin 108b).