´Aishah narrated:` "When the Prophet (S) would not perform the four Rak'ah before Az-Zuhr he would pray them after it."
Related hadith on this topic
Explanation & Benefits
Shaykh Dr. Abdur Rahman Freywai
1؎ :
From this, it is evident that the Prophet (sallallahu alayhi wa sallam) was diligent in observing these Sunnahs.
Therefore, we too should be diligent in performing these Sunnahs.
If we are unable to perform them beforehand, then we should perform them after the obligatory (fard) prayer.
However, this is not a make-up (qada) of an obligatory act.
Source: Sunan al-Tirmidhi – Majlis ‘Ilmi Dar al-Da‘wah, New Delhi Edition, Page: 426