The hairs on His body are the cause of all vegetation, particularly of those trees which are required as ingredients for sacrifice. The hairs on His head and face are reservoirs for the clouds, and His nails are the breeding ground of electricity, stones and iron ores.
Srimad Bhagavata Purana
श्रीमद्भागवतमहापुराणम्
मूल श्लोकः
केशश्मश्रुनखान्यस्य शिलालोहाभ्रविद्युताम् । बाहवो लोकपालानां प्रायशः क्षेमकर्मणाम्
keśaśmaśrunakhānyasya śilālohābhravidyutām | bāhavo lokapālānāṃ prāyaśaḥ kṣemakarmaṇām
SB 2.6.5