Śatapatha Brāhmaṇa ("of a hundred paths") 7.3.1.46

7.3.1.46

āpyāyasva sametu te | viśvataḥ soma vṛṣṇyamiti reto vai vṛṣṇyamāpyāyasva sametu te sarvataḥ soma reta ityetadbhavā vājasya saṃgatha ityanne vai vājo bhavānnasya saṃgatha ityetatsaṃ te payāṃsi samu yanti vājā iti raso vai payo 'nne vājāḥ saṃ te rasāḥ samu yantvannānītyetatsaṃ vṛṣṇyabhimātiṣāha iti saṃ retāṃsi pāpmasaha ityetadāpyāyamāno amṛtāya someti prajātyāṃ tadamṛtaṃ dadhāti tasmātprajātiramṛtā divi śravāṃsyuttamāni dhiṣveti candramā vā asya divi śrava uttamaṃ sa hyenamamuṣmiṃloke śrāvayati dvābhyāmāpyāyayati gāyatryā ca triṣṭubhā ca tasyokto bandhuḥ

[Vâg. S. XII, 112, 113; Rik S. I, 91, 16, 18] 'Grow thou! let manly power gather in thee from all sides, O Soma!' manly power doubtless is seed: thus, 'Grow thou! let seed gather in thee from every side, O Soma!'--'Be thou in the gathering of strength!' in food doubtless is strength: thus, 'be thou in the gathering of food!'--'Let the drinks, let the forces gather in thee!'--drink doubtless means vital sap, and in food are forces: thus, let vital sap, let food gather itself in thee!'--'and manly powers in thee, the overcomer of enemies;' that is, 'and seed in thee, the overcomer of evil;'--'growing, O Soma, for the sake of immortality,' he thereby lays immortality into the generative power, whence generative power is immortal;--'gain thou the highest glory in the heavens!' his highest glory in the heavens doubtless is the moon, for that one causes him to be celebrated in yonder world. With two (verses) he makes him grow, a gâyatrî and a trishtubh one,--the significance of this has been explained.