CHĀNDOGYA UPANISHAD · 2.9.1

अथ खल्व् अमुम् आदित्यं सप्तविधं सामोपासीत ।
सर्वदा समस् तेन साम ।
मां प्रति मां प्रतीति सर्वेण समस् तेन साम ॥

atha khalv amum ādityaṃ saptavidhaṃ sāmopāsīta ।
sarvadā samas tena sāma ।
māṃ prati māṃ pratīti sarveṇa samas tena sāma ॥

Let a man meditate on the sevenfold Sâman as the sun. The sun is Sâman, because he is always the same (sama); he is Sâman because he is the same, everybody thinking he looks towards me, he looks towards me.