Skandapurana 6.3.28.124

6.3.28.124

trikālamarcayedīśaṃ devadevaṃ trilocanam .
daśāṃśena tu rājendra homaṃ tatraiva kārayet .. 28.124 ..

one should worship Īśa, the three-eyed god of gods, at the three times of the day. / One should have a fire offering made right there with one tenth [of the japa count], O best of kings.