Bhagavatapurana 7.14.22

7.14.22

māghe ca sitasaptamyāṃ maghārākāsamāgame /
rākayā cānumatyā ca māsarkṣāṇi yutānyapi //

22. In the month of Magha, on the seventh day of the bright half, on the full moon day of Magha, on the full moon days when the moon is not completely full and on the days on which the stars are of the same as the months;