Punishment for leaving 1 prayer

From Ibn Mas’ud, may Allah be pleased with him, it is reported that the Prophet, peace and blessings of Allaah be upon him, said:

“A command was sent down concerning one of the slaves of Allah, to subject him to punishment in the grave, giving him a hundred blows. However, he did not stop pleading and begging until all the blows were replaced with one. And they hit him once, after which his grave was filled with fire. When he came to his senses and got up, he asked: “Why did they hit me?” They answered him: “You made one prayer without washing, and passed by the oppressed, without giving him help!”

This hadith was narrated by at-Tahawi (3/231). The hadith is authentic. See al-Silsilah al-sahiha (2774).