11. Prolonged obligation spoils the pureness of a good turn. Leave a Comment / To put [others] under obligation / By technorthstar3@gmail.com 11. Prolonged obligation spoils the pureness of a good turn. 11 طُولُ الاِمْتِنانِ يُكَدِّرُ صَفْوَ الإحْسانِ. Share on Whatsapp Bookmark (0) Please login to bookmark Username or Email Address Password Remember Me No account yet? Register