A man should not look sharply at his brother when he turns away

Al-Adab Al-Mufrad · Book 33 · Hadith 771

حَدَّثَنَا بِشْرُ بْنُ مُحَمَّدٍ، قَالَ‏:‏ أَخْبَرَنَا عَبْدُ اللهِ، قَالَ‏:‏ حَدَّثَنَا حَمَّادُ بْنُ زَيْدٍ، عَنْ لَيْثٍ، عَنْ مُجَاهِدٍ قَالَ‏:‏ يُكْرَهُ أَنْ يُحِدَّ الرَّجُلُ إِلَى أَخِيهِ النَّظَرَ، أَوْ يُتْبِعَهُ بَصَرَهُ إِذَا وَلَّى، أَوْ يَسْأَلَهُ‏:‏ مِنْ أَيْنَ جِئْتَ، وَأَيْنَ تَذْهَبُ‏؟‏‏.‏

Mujahid said, "It is disliked for a man to stare at his brother or let his eye follow him when he turns his back or to ask, 'Where have you come from? Where are you going?'"