Imam al-Sadiq (AS) said, ‘Verily the most hidden and subtle way that Satan has managed to gain control over man is that he has made himself an abode under his nails.
الإمامُ الصّادقُ (عَلَيهِ الّسَلامُ): إنّ أستَرَ وأخفى ما يُسَلَّطُ الشَّيطانُ مِنِ ابنِ آدَمَ أن صارَ أن يَسكُنَ تَحتَ الأظافِيرِ.
Similar narrations
Al-Kāfi #2147“Abu ‘Abd Allah, Alayhi al-Salam, has said, ’The strongest cover and most secret place for Satan by which he dominates children of Adam,...