Kaushitaki Upanishad 2.12.12

2.12.12

atha ya enaṃ dviṣanti yāṃś ca svayaṃ dveṣṭi ta evainaṃ parimriyante //12//

So verily, indeed, if upon one who knows this both mountains should roll themselves forth—both the southern and the northern —desiring to lay him low, indeed they would not lay him low. But those who hate him and those whom he himself (svayam) hates—these all die around him.