अथ यत्रैतत्पुरुषः पिपासति नाम तेज एव तत्पीतं नयते तद्यथा गोनायोऽश्वनायः पुरुषनाय इत्येवं तत्तेज आचष्ट उदन्येति तत्रैतदेव शुङ्गमुत्पतितं सोम्य विजानीहि नेदममूलं भविष्यतीति ॥ ६.८.५ ॥
In plain words
And when a person here is thirsty, as men say, it is heat that leads away what he has drunk. As men speak of a leader of cows, a leader of horses, a leader of men, so they speak of heat as the leader of water — udanyā. Know, my dear, that a shoot has sprung up here; it will not be without a root.