Śatapatha Brāhmaṇa ("of a hundred paths") 11.1.6.24

11.1.6.24

athodīcīṃ diśamapaśyan tāmapo'kurvatopaināmitaḥ kurvīmahīti taṃ dharmamakurvata dharmo vā āpastasmādyademaṃ lokamāpa āgacanti sarvamevedaṃ yathādharmam bhavatyatha yadāvṛṣṭirbhavati balīyāneva tarhyabalīyasa ādatte dharmo hyāpaḥ

They then beheld the northern quarter, and made it the waters. 'Let us improve it from here!' they said, and made it (to represent) the law, for the waters are the law: hence whenever the waters come (down) to this (terrestrial) world everything here comes to be in accordance with the law; but whenever there is drought, then the stronger seizes upon the weaker, for the waters are the law.