It is narrated from Sayyiduna Abu Sa'id Khudri, may Allah be pleased with him, that the Messenger, peace and blessings be upon him and his family, said: Ninety-nine serpents are set upon the disbeliever in the grave, which continue to bite him until the Day of Resurrection. (They are so venomous that) if one of those serpents were to blow on the earth, it would never produce vegetation.