ॐ असुर्या नाम ते लोका

3rd Mantra Of Isa-Upanishad

              
ॐ असुर्या नाम ते लोका अन्धेन तमसाऽऽवृताः।
ताँस्ते प्रेत्याभिगच्छन्ति ये के चात्महनो जनाः॥३॥

After departing their bodies, they (those that are ignorant) who have killed the Self go to the worlds of the devils (as compared with the non-dual state of the supreme Self even gods are (Asuras), covered with blinding ignorance.