Sayyiduna Abu Hurairah (may Allah be pleased with him) narrated from the Messenger of Allah (peace and blessings be upon him), he (peace be upon him) said: "When the iqamah for prayer is given, then there is no other prayer except the obligatory prayer."
Hadith Referenceمسند اسحاق بن راهويه / كتاب الصلوٰة / 172