Isaiah 7:15

Butter and honey; the common food of children in that Country, where they were in great abundance, and of the best sort. He; the virgin's Son last mentioned, who, though he be God blessed for ever, yet shall become man, and, to show the truth of his humanity, shall not only be conceived and brought forth, but also shall be nourished and brought up, by the same means and steps as other children; which is justly mentioned here as a stupendous and miraculous work of God. That he may know; that by this food he may grow up, and so may know, &c. Or, until he know, as it is rendered by divers learned men, and, among others, by the Chaldee interpreter, who best knew the use of this particle among the Hebrews. To refuse the evil, and choose the good; to discern between things morally good and evil; which children are capable of doing, in some measure, when they are five or six years old. Compare Deuteronomy 1:39, where young children are described by this character, that they had no knowledge between good and evil.