Garudapurana 1.59.11

1.59.11

māheśvarī cottare ca dvitīyā daśāmītithau /
pañcamyāṃ ca trayodaśyāṃ vārāhī dakṣiṇe sthitā //

Māheśvarī in the north on the second and tenth lunar days; / on the fifth and thirteenth, Vārāhī resides in the south;