Atharvaveda 12.1.13

12.1.13

yásyāṃ védiṃ parigr̥hṇánti bhū́myāṃ yásyāṃ yajñáṃ tanváte viśvákarmāṇaḥ |
yásyāṃ mīyánte sváravaḥ pr̥thivyā́m ūrdhvā́ḥ śukrā́ ā́hutyāḥ purástāt |
sā́ no bhū́mir vardhayad várdhamānā ||13||

On what earth (bhū́mi) they enclose the sacrificial hearth; on what [earth] men of all works extend the sacrifice; on what earth are set up (mi) the sacrificial posts, erect, bright, before the oblation—let that earth (bhū́mi), increasing, make us increase.