Whenever the Sahaba met and seperated they would recite Surah Al-Asr.
Surah Al-Asr is a short and comprehensive chapter of The Quran,which reminds us that the saved group of human beings are those who:
- Believe in Islam
- Do righteous deeds
- Call people towards the truth(i.e. Islam and whatever relates to it)
- Bear patiently (in hardship, ease and worship)
It was narrated that Abu Madeenah al-Darimi said:
When two men among the companions of the Prophet (ﷺ) met, they did not part until one of them recited to the other:
1. “By al‑‘Asr (the time).
2. Verily, man is in loss” [i.e., Surah al-‘Asr],
then one would say Salam to (greet) the other.
Narrated by Abu Dawood (no. 417),classed as saheeh by al-Albani in al-Silsilah al-Saheehah (2648).