Origen

“ But now let us also touch upon another interpretation which was uttered by some one of our predecessors, exhorting those who were married to sanctity and purity; for by the two, he says, whom the Word desires to agree on earth, we must understand the husband and wife, who by agreement defraud each other of bodily intercourse that they may give themselves unto prayer; [1] when if they pray for anything whatever that they shall ask, they shall receive it, the request being granted to them by the Father in heaven of Jesus Christ on the ground of such agreement. ”