Abu Hamzah reported: Ibrahim al-Nakha’i, may Allah have mercy on him, said, “By Allah, I have not seen in what they produce as much good as the weight of a seed,” meaning the people of whims, opinions, and speculation.
Source: Ḥilyat al-Awliyā’ 4/222
عَنْ أبي حمزة عَنْ إبراهيم النخعي رحمه الله قَالَ وَاللَّهِ مَا رَأَيْتُ فِيمَا أَحْدَثُوا مِثْقَالَ حَبَّةٍ مِنْ خَيْرٍ يَعْنِي أَهْلَ الْأَهْوَاءِ وَالرَّأْيِ وَالْقِيَاسِ
4/222 حلية الأولياء وطبقات الأصفياء