दुग्धेऽस्मै वाग्दोहं यो वाचो दोहोऽन्नवानन्नादो भवति य एतदेवं विद्वान्वाचि सप्तविधं सामोपास्ते ॥ २.८.३ ॥
In plain words
For him speech yields its milk, which is the milk of speech; and he becomes one who has food and eats food, who knowing this worships the sevenfold Sāman in speech.