2 Esdras 14:45–47

45 And when the forty days were ended, the Most High spoke to me, saying, “Make public the twenty-four books that you wrote first and let the worthy and the unworthy read them; 46 but keep the seventy that were written last, in order to give them to the wise among your people. 47 For in them is the spring of understanding, the fountain of wisdom, and the river of knowledge.”