Where did the Buddha say: "What a person considers and reflects upon for a long time, to that his mind will bend and incline."?

> As the Buddha says, "What a person considers and reflects upon for a > long time, to that his mind will bend and incline." The above quote is from Nyanaponika Thera, found here at Access to Insight. Does anyone know where the Buddha says that, in the Pali Canon? A google search of the quote was not helpful.