وَمَنْ أَشَارَ عَلَى أَخِيهِ بِأَمْرٍ يَعْلَمُ أَنَّ الرُّشْدَ فِي غَيْرِهِ، فَقَدْ خَانَهُ
Translation: Whoever advises a fellow person to do something while knowing that the sounder course lies elsewhere has betrayed that person.
Source: أبو داود
أَشَارَ عَلَى أَخِيهِ means “advised his brother,” referring here to a fellow person deserving sincere counsel. يَعْلَمُ states that the adviser actually knows a better course. الرُّشْدَ denotes the sound or beneficial way, and فِي غَيْرِهِ means that it lies in an alternative to the proposed action.
When someone knowingly recommends the worse course while aware of a better option, that is a betrayal of trust rather than sincere advice. Accuracy and good faith are central to consultation.