(a) Sayyiduna Abu Hurayrah (may Allah be pleased with him) said that Sayyiduna Abu Bakr and Sayyiduna Umar (may Allah be pleased with them both) prostrated in Surah al-Inshiqaq and Surah al-Alaq, and so did the one who is better than both of them, that is, the Messenger of Allah (peace and blessings be upon him).
(b) Concerning prostration in Surah al-Alaq, a report has also been narrated to us from Sayyiduna Ali (may Allah be pleased with him) and Sayyiduna Abdullah bin Mas'ud (may Allah be pleased with him).
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الصلاة / 3726