Deuteronomy 31:21

And it shall come to pass, when many evils and troubles are befallen them, that this song shall testify against them as a witness; for it shall not be forgotten out of the mouths of their seed: for I know their imagination which they go about, even now, before I have brought them into the land which I sware.

Ver. 21. For I know their imagination.] As a man that knows what roots he hath in his garden; though there be not a flower appears, yet he can say, when the spring comes, this and this will come up, because he knows the garden, and knows what roots are there: so the Lord knows our thoughts afar off, because he knows the principles that are within, and knows what they will do when occasion serves; he is privy to that root that beareth gall and wormwood. Deu 29:18