BṚHADĀRAṆYAKA UPANISHAD · 4.4.11

अनन्दा नाम ते लोका अन्धेन तमसावृताः ।
तांस् ते प्रेत्याभिगच्छत्य् अविद्वांसो ऽबुधा जनाः ॥

anandā nāma te lokā andhena tamasāvṛtāḥ ।
tāṃs te pretyābhigacchaty avidvāṃso ’budhā janāḥ ॥

'There are indeed those unblessed worlds, covered with blind darkness. Men who are ignorant and not enlightened go after death to those worlds.

F. Max Müller · The Upanishads, Sacred Books of the East 15 (1884)