The Baudhayana Dharmasutra (BDS) 1.1.2.10 (perhaps compiled in the 8th to 6th centuries BCE) declares that Āryāvarta is the land that lies west of Kālakavana, east of Adarsana, south of the Himalayas and north of the Vindhyas, but in BDS 1.1.2.11 Āryāvarta is confined to the doab of the Ganges-Yamuna. BDS 1.1.2.13-15 considers people from beyond this area as of mixed origin, and hence not worthy of emulation by the Aryans. Some sutras recommend expiatory acts for those who have crossed the boundaries of Aryavarta. Baudhayana Srautasutra recommends this for those who have crossed the boundaries of Aryavarta and ventured into far away places.