DIALOGUE WITH TRYPHO
From CHAPTER CXXXIV [134]-- THE MARRIAGES OF JACOB ARE A FIGURE OF THE CHURCH.
“If, then, the teaching of the prophets and of Himself moves you, it is better for you to follow God than your imprudent and blind masters, who even till this time permit each man to have four or five wives; and if any one see a beautiful woman and desire to have her, they quote the doings of Jacob [called] Israel, and of the other patriarchs, and maintain that it is not wrong to do such things; for they are miserably ignorant in this matter. For, as I before said, certain dispensations of weighty mysteries were accomplished in each act of this sort. For in the marriages of Jacob I shall mention what dispensation and prophecy were accomplished, in order that you may thereby know that your teachers never looked at the divine motive which prompted each act, but only at the grovelling and corrupting passions.”
Source: http://www.earlychristianwritings.com/text/justinmartyr-dialoguetrypho.html