Garudapurana 1.59.36

1.59.36

dhaniṣṭhātritayaṃ bhaume budhe vai revatītrayam /
rohiṇyāditrayaṃ jīve śukre puṣyātrayaṃ śiva //

the triad of Dhaniṣṭhā on Tuesday; the triad of Revatī on Wednesday; / the triad beginning with Rohiṇī on Thursday; the triad of Puṣya on Friday, O Śiva;