Hadith 2203
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347. Amīr al-mu’minīn, peace be upon him, said: To praise more than what is due is sycophancy; to do it less is either because of inability to speak or of envy.
٣٤٧. وَقَالَ (عليه السلام): الثَّنَاءُ بِأَكْثَرَ مِنَ الِاسْتِحْقَاقِ مَلَقٌ وَالتَّقْصِيرُ عَنِ الِاسْتِحْقَاقِ عِيٌّ أَوْ حَسَدٌ.