Mishkat al-Masabih

Ibn ‘Umar said that when the Prophet (ﷺ) observed a period of private devotion in the mosque his bedding was placed for him, or a couch was put down for him, behind the column of repentance.* *A column in the Prophet's mosque in Medina, said to have got this name because the repentance of Abu Lubaba was accepted beside it. Ibn Majah transmitted it.