Kaushitaki Upanishad 2.12.11

2.12.11

tad yadi ha vā evaṃ vidvāṃsam ubhau parvatāv abhipravarteyātāṃ dakṣinaś cottaraś ca tustūrṣamānau na hainaṃ stṛṇvīyātām /

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.