Skandapurana 16.101.62

16.101.62

uttiṣṭhaṃti sadā hyete māsairdvādaśabhiḥ kramāt ..
viṣṇustapati vai caitre vaiśākhe cāryamā sadā .. 62 ..

They always rise in succession during the twelve months: / Viṣṇu shines in Caitra, and Aryaman always in Vaiśākha;