O Maitreya, repeating the name of the imperishable and mixing that poison with his food he ate it up. Prahlāda did not suffer any harm either in body or in mind for the very name of the endless baffled the power of the poison. Beholding that deadly poison digested by him, they stricken with fear approached the king of Daityas and said: "O king of Daityas, deadliest poison was offered by us but it was digested with food by thy son Prahlāda".
In plain words: Prahlada repeats Vishnu's name and eats the poisoned food. It does him no harm in body or mind, because the holy name defeats the poison. The scared cooks report to the king that his son digested the deadly poison.