Drawing of the two Yashas found in Patna with inscription mentionning they are "Yashas". Possibly Mauryan.
Cunningham, Alexander, Sir, 1814-1893
1882-01-01
Report of a tour in Bihar and Bengal in 1879-80, from Patna to Sunargaon Published 1882 <a rel="nofollow" class="external autonumber" href="https://archive.org/details/bub_gb_gW8IAAAAQAAJ">[1]</a>