Skandapurana 7.5.28_139

7.5.28_139

sa dehena vinaṣṭena tamasā mūcchitākṛtiḥ .
duḥkhasantatisaṃnaddho7 yātanāmaśnute bhṛśam . .4. .
yasmāt sa tamasā grasta anāśvastotidāruṇām8 .
yātanāmaśnute jantustamastasmāt sa ucyate ..5. .

With his body destroyed and his form swooning in darkness, / bound by continuous suffering, he endures severe torment. / Because that creature, seized by darkness and without comfort, / endures extremely terrible torment, it is called Tamas (Darkness).