अथ यत्प्रथमास्तमिते तन्निधनं तदस्य पितरोऽन्वायत्तास्तस्मात्तान्निदधति निधनभाजिनो ह्येतस्य साम्न एवं खल्वमुमादित्यं सप्तविधं सामोपास्ते ॥ २.९.८ ॥
In plain words
What it is when it has just set is the nidhana, and upon this the fathers depend; therefore men lay them down, for they share in the nidhana of this Sāman. Thus does a man worship that sun yonder as the sevenfold Sāman.