एतमु एवाहमभ्यगासिष तस्मान्ममत्वमेकोऽसीति ह कौषीतकि पुत्रमुवाचप्राणाँस्त्व भूमानमभिगायताद्बहवो वैमे भविष्यन्तीति ॥ ४ ॥
In plain words
This very prana I approached with my praise; therefore you are my only son, said Kauṣītaki to his son. 'Do you all instead sing to the vast prana as the infinite, so that many sons will be mine.'
Close to the Sanskrit
This one indeed I praised; therefore you are one alone, thus Kauṣītaki said to his son: 'But praise ye the pranas as the infinite, so that many will be mine.'