يُنْقِذُكَ مَالُكَ ... تُوبِقُكَ أَعْمَالُكَ
Your wealth rescues you ... your deeds bring you to ruin.
In yunqidhuka, the attached kāf is the object; māluka is the nominative subject. In tūbiquka, kāf is again the object, while aʿmāluka is the subject. The verb forms agree appropriately with their grammatical subjects.
Treating wealth and deeds as the two agents makes the contrast grammatically striking as well as morally pointed.