Julius Africanus, Ante-Nicene Fathers Vol. VI, Extant Fragments of the Chronography… (1885)
“ God decreed to destroy the whole race of the living by a flood, having threatened that men should not survive beyond 120 years. Nor let it be deemed a matter of difficulty, because some lived afterwards a longer period than that. For the space of time meant was 100 years up to the flood in the case of the sinners of that time; for they were 20 years old. God instructed Noe, who pleased him on account of his righteousness, to prepare an ark ”
