Skandapurana 1.4.35.34

1.4.35.34

pūrveṇa maṃdaro nāmadakṣiṇe gaṃdhamādanaḥ..
vipulaḥ paścimo jñeyaḥ supārśvastu tathottare.. 37.34 ..

to the east, Mandara by name; to the south, Gandhamādana; / Vipula is to be known to the west, and Supārśva to the north. 37.34