Al-Kāfi - Volume 1 > Chapter on Those who Act without Knowledge
Hadith #1

1ـ عِدَّةٌ مِنْ أَصْحَابِنَا عَنْ أَحْمَدَ بْنِ مُحَمَّدِ بْنِ خَالِدٍ عَنْ أَبِيهِ عَنْ مُحَمَّدِ بْنِ سِنَانٍ عَنْ طَلْحَةَ بْنِ زَيْدٍ قَالَ سَمِعْتُ أَبَا عَبْدِ الله (عَلَيْهِ السَّلام) يَقُولُ الْعَامِلُ عَلَى غَيْرِ بَصِيرَةٍ كَالسَّائِرِ عَلَى غَيْرِ الطَّرِيقِ لا يَزِيدُهُ سُرْعَةُ السَّيْرِ إِلا بُعْداً.

1. A number of our people have narrated from Ahmad ibn Muhammad ibn Khalid from his father from Muhammad ibn Sinan from Talha ibn Zayd who has said the following. “(Imam) abu ‘Abdallah (a.s.) has said, ‘Working without understanding and insight is like travelling in the wrong direction that only takes one farther away from the destination.’”