ŚVETĀŚVATARA UPANISHAD · 5.1

द्वे अक्षरे ब्रह्मपरे त्व् अनन्ते विद्याविद्ये निहिते यत्र गूढे ।
क्षरं त्व् अविद्या ह्य् अमृतं तु विद्या विद्याविद्ये ईशते यस् तु सो ऽन्यः ॥

dve akṣare brahmapare tv anante vidyāvidye nihite yatra gūḍhe ।
kṣaraṃ tv avidyā hy amṛtaṃ tu vidyā vidyāvidye īśate yas tu so ’nyaḥ ॥

In the imperishable and infinite Highest Brahman, wherein the two, knowledge and ignorance, are hidden, the one, ignorance, perishes, the other, knowledge, is immortal; but he who controls both, knowledge and ignorance, is another.

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