Yes, it is mandatory to perform the Adhan before offering the Salaat. The Adhan is a call to prayer that is made publicly to inform the Muslim community that the time for prayer has arrived. It consists of specific phrases, including "Allahu Akbar" (Allah is the Greatest), and "Ashhadu anna la ilaha illa Allah" (I bear witness that there is no deity but Allah). The Adhan is a symbolic declaration of the oneness of Allah and the submission of Muslims to Him. After the Adhan, Muslims perform the ritual ablution (Wudu) and then offer the Salaat.
