Muawiya ibn Wahb asked Imam Jafar ibn Muhammad Al-Sadiq عليه السلام about the adhan (call to prayer). The Imam said: "Raise your voice and speak loudly when giving the adhan. When performing the iqamah (second call to prayer), use a slightly lower voice. Do not delay your adhan and iqamah except until the time for prayer has arrived, and recite the iqamah quickly (with fluidity)."