Jeremiah 33:16

In those days shall Judah be saved, and Jerusalem shall dwell safely, the name in either case designating the Church of the Lord, His chosen people in the true sense of the term; and this is the name wherewith she shall be called, The Lord our Righteousness, the city, as representing the congregation of the Lord, being united with Him by virtue of the mystical union, so that, whatsoever belongs to the Head, belongs also to the members. The Church draws all her righteousness from Christ and is a representative of His righteousness, hence His attributes may be transferred to her.