这句话出自《圣经》哪里？

你的意思不太明确。如果寻找“私利”，圣经中没有一句经文中有私利二字。
如果查“神的义”，有如下经文：是否有你需要的经文。
罗1:17 因为神的义，正在这福音上显明出来。这义是本于信以致于信。如经上所记，义人必因信得生。
For therein is the righteousness of God revealed from faith to faith: as it is written, The just shall live by faith.
罗3:5 我且照着人的常话说，我们的不义，若显出神的义来，我们可以怎么说呢？神降怒，是他不义吗？
But if our unrighteousness commend the righteousness of God, what shall we say? Is God unrighteous who taketh vengeance? (I speak as a man)
罗3:21 但如今神的义在律法以外已经显明出来，有律法和先知为证。
But now the righteousness of God without the law is manifested, being witnessed by the law and the prophets;
罗3:22 就是神的义，因信耶稣基督，加给一切相信的人，并没有分别。
Even the righteousness of God which is by faith of Jesus Christ unto all and upon all them that believe: for there is no difference:
罗3:25 神设立耶稣作挽回祭，是凭着耶稣的血，借着人的信，要显明神的义。因为他用忍耐的心，宽容人先时所犯的罪。
Whom God hath set forth to be a propitiation through faith in his blood, to declare his righteousness for the remission of sins that are past, through