Anandakanda 1.3.45

1.3.45

upaspṛśya ca saṃkalpya nityatarpaṇamācaret /
ādau śivatrayaṃ vighnanāthaṃ kṣetrādhipaṃ harim //

Having sipped water and formed the intention, he should perform the daily water libation: / first to the triad of Śivas, the lord of obstacles, the guardian of the field, and Hari;