He is also called Ash-Sadek (the true) and many hadiths mention the Prophet as being Ash-Sadek Al Masduq (the truthful and confirmer).
Siya ay tinatawag ding Abo-Sadek (ang tunay na) at maraming hadiths banggitin ang Propeta bilang Abo-Sadek Al Masduq (ang matapat at confirmer).