Narrated Abdullah ibn Umar: The Prophet ﷺ said: May Allah show mercy to a man who prays four rak'ahs before the afternoon prayer.
The Prophet Muhammad also taught us that we should always strive for excellence in our acts of worship so that we can receive more blessings from Allah. He said “Whoever does an action for which he will receive reward from his Lord, let him do it with excellence” [Bukhari]. Therefore, when praying these four rak'ahs before the afternoon prayer we should strive to do them with excellence so as to increase our chances of gaining more mercy from Allah.