عَنْ كَعْبِ بْنِ مَالِكٍ رَضِيَ اللَّهُ عَنْهُ أَنَّ النَّبِيَّ صَلَّى اللَّهُ عَلَيْهِ وَآلِهِ وَسَلَّمَ قَالَ مَا ذِئْبَانِ جَائِعَانِ أُرْسِلَا فِي غَنَمٍ أَفْسَدَا لَهَا مِنْ حِرْصِ الْمَرْءِ عَلَى الْمَالِ وَالشَّرَفِ لِدِينِهِ
Narrated from Sayyiduna Ka'b bin Malik (may Allah be pleased with him) that the Noble Prophet (peace and blessings be upon him) said: If two wolves are let loose among sheep, they do not cause as much harm to them as a servant's greed for wealth and honor causes to his religion.