Al-Zuhri (may Allah have mercy on him), narrating with the same meaning, said that he (peace and blessings be upon him) combined the two with one iqamah each. Waki' (may Allah have mercy on him) said: He prayed each prayer with one iqamah.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الصلاة / 1879