عَنْ عَوْفِ بْنِ مَالِكٍ الْأَشْجَعِيِّ رَضِيَ اللَّهُ عَنْهُ قَالَ سَمِعْتُ رَسُولَ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَآلِهِ وَسَلَّمَ يَقُولُ لَا يَقُصُّ عَلَى النَّاسِ إِلَّا أَمِيرٌ أَوْ مَأْمُورٌ أَوْ مُخْتَالٌ (وَفِي لَفْظٍ) لَا يَقُصُّ إِلَّا أَمِيرٌ أَوْ مَأْمُورٌ أَوْ مُتَكَلِّفٌ
Sayyiduna Awf bin Malik Ashja'i (may Allah be pleased with him) narrates that the Messenger of Allah (peace and blessings be upon him) said: No one tells stories to people except a leader, one who is appointed, or an arrogant person. In another narration, it is stated: No one delivers admonition except a leader, one who is appointed, or one who affects artificiality. Here, "telling stories" refers to giving admonition and advice. That is why the one who gives admonition and advice is called a "Qaas."