Shatapatha Brahmana 4.5.8.12

4.5.8.12

tadyā etāstisrastisrastriṃśatyadhi bhavanti | tāsvetāmupasamākurvanti vi vā etāṃ virājaṃ vṛhanti yāṃ vyākurvanti vicinno eṣā virāḍyā vivṛḍhā daśākṣarā vai virāṭtatkṛtsnāṃ virājaṃ saṃdadhāti tāṃ hotre dadyāddhotā hi sāhasastasmāttāṃ hotre dadyāt

And what three (cows) there are each time over and above the (three hundred and) thirty, thereto they add that one. Now, when they draw out a Virâg (verse), they pull it asunder, and a Virâg which is pulled asunder is torn in two;--and the Virâg consisting of ten syllables, he thus makes the Virâg complete. Let him give her to the Hotri; for the Hotri is a thousandfold: therefore let him give her to the Hotri.