وَأَلْقِ مَا فِي يَمِينِكَ (And throw what is in your right hand - 20:69). Allah commanded Sayyidna Musa (علیہ السلام) by means of a revelation (وحی) to cast down what he held in his right hand, and when he threw down his staff it turned into a huge snake and ate up all the imaginary snakes which the Egyptian magicians had produced by their magic.

Conversion to Islam and bowing in prostration by the Pharaoh's magicians

The Egyptian magicians who were masters of their art realized at once that what they had just witnessed was not magic but a miracle brought about by a Supreme Power. Consequently they fell in prostration and declared openly their faith in Allah - the God of Sayyidna Musa (علیہ السلام) and Sayyidna Harun (علیہ السلام) . According to some traditions these magicians did not raise their heads until they had seen a glimpse of heaven and hell. (رواہ عبد بن حمید و ابن ابی حاتم وابن ال؛منذر عن عکرمہ - روح)