The Borrowed Pen [trustworthiness]
It is reported that ʿAbdullāh b. Al-Mubārak said, “I once borrowed a pen in Al-Shām (Transjordan) and went to return it. But when I came back to Marwu (Eng. Merv , in Central Asia) I saw that I still had it, so I went back to Al-Shām to return it to its owner.”
Al-Dhahabī, Siyar A’lām Al-Nubalā`, Vol. 8 p395.
Also read
Related sayings.
The Salaf used to be careful not to speak in front of elders unless absolutely needed.
As per general repect to elders, the Salaf would let someone who is older enter first, contrary to common practice today.