Zirr bin Hubaysh (may Allah have mercy on him) narrates from Sayyiduna Abdullah bin Mas'ud and Ammar bin Yasir (may Allah be pleased with them both) that both of them used to make two prostrations in Surah al-Hajj.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الصلاة / 3733