Agniveshyagrihyasutra 3.6.1.13

3.6.1.13

tatpracchādyena parṇamayena sruveṇopaghātaṃ juhoti ya etasya patho goptārastebhyaḥ svāhā iti nava sruvāhutīḥ \

Having covered that, he offers dipping oblations with a wooden spoon made of palāśa wood: "To those who are guardians of this path, svāhā!"—these are nine spoon oblations.