(Then the fire said) ‘The swan will tell you about another foot of Brahman.’ The next day Satyakāma collected the cows and drove them towards his teacher’s house. At dusk they arrived at a place (where they halted for the night). Having confined the cows and collected some fuel, he lit a fire and sat down just behind it facing east.
The swan came flying to him and said, ‘O Satyakāma.’ Satyakāma replied, ‘Yes, lord’.
(The swan said) ‘O Somya, let me tell you about one foot of Brahman.’ (Satyakāma replied) ‘Yes, lord, please tell me.’ (The swan) said to him: ‘Fire is one part, the sun is another part, the moon is a third part, and lightning is a fourth part. O Somya, these are the four parts that make up a foot of Brahman. This foot is named Jyotiṣmān, the Luminous’.
‘He who knows this foot of Brahman, which has four parts and is known as “the Luminous,” and worships it as such becomes illustrious in this world. He who knows this foot of Brahman, which has four parts and is known as “the Luminous,” and worships it as such attains worlds which are luminous.