30. One who has certitude works diligently. Leave a Comment / Certitude / By technorthstar3@gmail.com 30. One who has certitude works diligently. 30 مَنْ يَسْتَيْقِنْ يَعْمَلْ جاهِداً. Share on Whatsapp Bookmark (0) Please login to bookmark Username or Email Address Password Remember Me No account yet? Register