Sunan Abi Dawud Book 5, Hadith 22
The Prophet (ﷺ) said: May Allah show mercy to a man who prays four rak'ahs before the afternoon prayer.
The Prophet (ﷺ) said: The gates of heaven are opened for four rak'ahs containing no taslim (salutation) before the noon prayer.
Abu Dawud said: Yahya b. Sa'id al-Qattan said: If I were to narrate any tradition from 'Ubaidah, I would narrate this tradition.
Abu Dawud said: 'Ubaidah is weak.
Abu Dawud said: The name of the narrator Ibn Minjab is Sahm.
That the Prophet (ﷺ) used to pray two rak'ahs before the 'Asr prayer.