However, since this is from Uttarakhand, there's a popular notion of this, and a local text named Kedār - kalpa, which claims to be a part of kedāra khaṇḍa of Skanda Purāṇa, mention this. Most probably it's a shalasthala-purāṇa recension of Skanda Purāṇa's kedāra khaṇḍa, but we cannot be sure, as I ask about same in this question.