Ibrahim narrates: Sayyiduna Abdullah bin Mas'ud (may Allah be pleased with him) saw a man raising his hands towards the sky making supplication while he was in prayer. Sayyiduna Abdullah bin Mas'ud (may Allah be pleased with him) said: "What does he know? Perhaps his sight will be snatched away before it returns to him."
Hadith Referenceالمعجم الكبير للطبراني / باب العين / 9242