Shivapurana 8.9.21

Śivapurāṇa (complete text) 8.9.21

dṛṣṭe grahe ca diḍa.mohaḥ ṣaṇḍamāsājjāyate dhruvam utathya na dhruvaṃ paśyedyadi vā ravimaṇḍalam