Tosefta sur Jérémie 4:3

The attendant dips the intestines and places them in front of the guests. Even though there is no proof for this matter, there is at least a hint, as it is said (Jer. 4:3, JPS tr.), "Break up the untilled ground, And do not sow among thorns." The one who recites the Hallel -- they go to his place and recite it, and he does not go to their place. The one who recites [the Hallel] to his minor sons and daughters needs to answer with them at the place that they [are required to] answer. In which place does he answer [with them]? When he comes to "May he who enters be blessed" (Ps. 118:26, JPS tr.), he says with them "in the name of the Lord." When he comes to "We bless you" (ibid.), he says with them "from the House of the Lord."