। ॥ केचित् काय कर्मभिः ॥
In plain words
Those who see such a knower and honour him, whoever they are, who offer him fragrance, flowers, fruit, incense, water for bathing, clothing and food, by word, by mind and by bodily act,
Word for word
Seeing such a knower, the people who honour him, and those who offer fragrance, flowers, fruit, incense, a bath, cloth and food, whoever they are, with acts of speech, mind and body,