2 : 255 Allah! there is no Allah but He the living the Self-subsisting Eternal. No slumber can seize him nor sleep. His are all things in the heavens and on earth. Who is there can intercede in His presence except as He permitteth? He knoweth what (appeareth to his creatures as) before or after or behind them. Nor shall they compass aught of his knowledge except as He willeth. His throne doth extend over the heavens and the earth and He feeleth no fatigue in guarding and preserving them. For He is the Most High the Supreme (in glory).
Respond to him who sneezes three times with Yarhamak Allah. But if he sneezes more than this, you may not respond to him if you like. (Tirmizi)