It is narrated from Sayyiduna Abu Umamah (may Allah be pleased with him), or from another Companion, that Sayyiduna Bilal (may Allah be pleased with him) began the iqamah. When he said 'Qad qamat al-salah' (The prayer has been established), the Prophet (peace and blessings be upon him) said: "'Aqamaha Allahu wa adamaha' (May Allah establish it and make it last)." And for the rest of the iqamah he said the like of the hadith of Umar about the adhan.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الصلاة / 1940