Agniveshyagrihyasutra 2.5.8.24

2.5.8.24

athāpareṇāgnimarkaparṇeṣu hutaśeṣaṃ nidadhāti yo rudro agnau yo apsu ya oṣadhīṣu yo rudro viśvā bhuvanā viveśa tasmai rudrāya namo astu iti \

Then, behind the fire, he places the remnant of the oblation upon arka leaves with: "Rudra who is in the fire, who is in the waters, who is in the plants, Rudra who has entered all worlds—to that Rudra be homage!"