Khadiragrihyasutra 2.5.31

2.5.31

apo 'bhivyakhyamityapo jyotirabhivyakhyamityagniṃ paśūnabhivyakhyamiti vatsaṃ surabhivyakhyamityādityaṃ visṛjedvācam / 31

At water (he should look) with (the words), 'Water have I beheld!' At fire with (the words), 'Light have I beheld!' At the calf with (the words), 'Cattle have I beheld!' At the sun with (the words), 'The sky have I beheld!'—thus he should break his silence.