More often than not, biblical poetry is written in the form of prose and not in poetic form. Nonetheless, in order to understand the content of a psalm, one must determine its poetic structure. Psalm 130 can be divided into 4 stanzas and a concluding line which is both separate and integral to the rest of the psalm. 

Courtesy of the Virtual Beit Midrash, Yeshivat Har Etzion