Revākhaṇḍa of the Skandapurāṇa manuscripts (RKS) 88.5

88.5

āṣāḍhadaśamī tathā māghasyaiva casaptamī /
śrāvaṇasyāṣṭamī kṛṣṇā tathāṣāḍhī tu pūrṇimā //

likewise the tenth of Āṣāḍha, and the seventh of Māgha,
the dark eighth of Śrāvaṇa, and the full moon of Āṣāḍha;