Sayyiduna Ibn Mas'ud (may Allah be pleased with him) said: "Whoever recites Surah al-A'raf, Surah al-Najm, or 'Read in the name of your Lord who created', then if he wishes, he may bow with them and that will suffice for him; and if he wishes, he may prostrate, then stand and recite another surah, then bow and prostrate."
Hadith Referenceالمعجم الكبير للطبراني / باب العين / 8702