hadith
10833
۞
Imam Ali (AS) said, Three things cause ruin: boldness in front of the ruler, trusting a disloyal person and tasting poison as an experiment [to see how effective it is!].
الإمامُ عليٌّ (عَلَيهِ الّسَلامُ) : ثَلاثَةٌ مُهْلِكَةٌ: اَلجُرْأَةُ عَلَى السُّلْطانِ وَ ائْتِمانُ الخَوّانِ وَ شُرْبُ السَّمِ لِلتَّجْرِبَةِ