Śatapatha Brāhmaṇa ("of a hundred paths") 1.3.1.15

1.3.1.15

sa saṃnahyati | adityai rāsnāsītīyaṃ vai pṛthivyaditiḥ seyaṃ devānām patnyesā vā etasya patnī bhavati tadasyā etadrāsnāmeva karoti na rajjuṃ hiro vai rāsnā tāmevāsyā etatkaroti

He girds her, with the text (Vâg. S. I, 30), 'A zone art thou for Aditi!' Aditi, indeed, is this earth. She is the wife of the gods, and that one is his (the sacrificer's) wife. It is for the latter, accordingly, that he makes it a zone instead of a noose (or string). A zone means a girdle, and he thereby makes it this for her.