Distinguished features of Muslims
According to tradition: Skullcap, beard, miswak, rosary, robe.
According to Quran:To be reliable (al-Qasas [28] 26), mercy (al-Fath [48] 29), taqwa (al-Hujurat [49] 13), justice (an-Nahl [16] 90), peace (Yunus [10] 25), chastity (al-Muminun [23] 5), salâh (al-Baqara [2] 43).
The Quran emphasizes fulfill of principles, but not appearances!