Partly they persisted in their obduracy of heart because Noah had made known to them that the flood would not descend so long as the pious Methuselah sojourned among them. The period of one hundred and twenty years which God had appointed as the term of their probation having expired, Methuselah died, but out of regard for the memory of this pious man God gave them another week's respite, the week of mourning for him. During this time of grace, the laws of nature were suspended, the sun rose in the west and set in the east. To the sinners God gave the dainties that await man in the future world, for the purpose of showing them what they were forfeiting.[19] But all this proved unavailing, and, Methuselah and the other pious men of the generation having departed this life, God brought the deluge upon the earth.[20] THE HOLY BOOK Great wisdom was needed for building the ark, which was to have space for all beings on earth, even the spirits. Only the fishes did not have to be provided for.[21] Noah acquired the necessary wisdom from the book given to Adam by the angel Raziel, in which all celestial and all earthly knowledge is recorded. While the first human pair were still in Paradise, it once happened that Samael, accompanied by a lad, approached Eve and requested her to keep a watchful eye upon his little son until he should return. Eve gave him the promise. When Adam came back from a walk in Paradise, he found a howling, screaming child with Eve, who, in reply to his question, told him it was Samael's. Adam was annoyed, and his annoyance grew as the boy cried and screamed more and more violently. In his vexation he dealt the little one a blow that killed him. But the corpse did not cease to wail and weep, nor did it cease when Adam cut it up into bits. To rid himself of the plague, Adam cooked the remains, and he and Eve ate them. Scarcely had they finished, when Samael appeared and demanded his son. The two malefactors tried to deny everything; they pretended they had no knowledge of his son. But Samael said to them: "What! You dare tell lies, and God in times to come will give Israel the Torah in which it is said, 'Keep thee far from a false word'?" While they were speaking thus, suddenly the voice of the slain lad was heard proceeding from the heart of Adam and Eve, and it addressed these words to Samael: "Go hence! I have penetrated to the heart of Adam and the heart of Eve, and never again shall I quit their hearts, nor the hearts of their children, or their children's children, unto the end of all generations."