Śatapatha Brāhmaṇa ("of a hundred paths") 1.1.2.8

1.1.2.8

uto pātryai gṛāmu tarhyavastadupohya gṛhṇīyādyato yunajāma tato vimuñccanti

Some do indeed take it from a (wooden) jar. In that case also he should mutter the Yagus-texts without omitting any; and let him in that case take (the rice) after inserting the wooden sword under (the jar). He does so, thinking 'where we want to yoke, there we unyoke;' for from the same place where they yoke, they also unyoke.