Inscription on a slab of stone which had been used to form a bridge over a conduit in front of the temple of Bhīmasena, Maṅgal Bazār, Pāṭan. Now housed in the National Museum of Nepal. Saṃvat 517 or 516.
Images:
IN02029 Bhimasena Temple Inscription
https://zenodo.org/record/1050396