John Trapp on Daniel 9:2

Ver. 2. I Daniel underſtood by books] Conſideravi in libris: Daniel was a great ſtudent in the Scriptures, and well knew that there was no readier way to ſpeed in heaven, then by putting the Promiſes in ſuit. The like alſo was done by Jacob. Gen 32.9, 12. (See the Notes there) by David, 2 Sam. 7.19, 25. by Eliah, 1 Kings 18.42. and others. If we ſpeak in our Prayers no otherwiſe then the Lord doth in his Promiſes, there ſhall be a ſweet conſort of voice, begun by the Spirit in the Promiſes, ſeconded in the ſpirit of faith by the Saints prayers, and anſwered by God in his gracious Providences. Daniel here took this courſe; and had not only what he begged, but a revelation concerning the Lord Chriſt, beyond expectation.