Skandapurana 1.3.31.81

1.3.31.81

brahmaṇo daśamī jñeyā rudrasyaikādaśī tathā..
viṣṇupriyā dvādaśī ca aṃtakasya trayodaśī.. 33.81 ..

the tenth should be known as Brahmā's, and the eleventh as Rudra's; / the twelfth is dear to Viṣṇu, and the thirteenth to the Ender;