The Mukhya Upaniṣads

Īśa · The Whole World in the Light of the Self

Mantra 14

सम्भूतिं च विनाशं च यस्तद्वेदोभयं सह ।विनाशेन मृत्युं तीर्त्वा सम्भूत्याऽमृतमश्नुते ॥ १४ ॥

In plain words

One who knows the Manifest and the perishable together crosses death through the perishable and attains relative immortality through the Manifest.