תלמוד על ברכות 86:21

The¹⁰⁸Tosephta Berakhot 5:29, Babli 43b. The text of the Tosephta manuscripts is close to the Yerushalmi. In the Babli and the traditional printed text of the Tosephta, the rôles of the Houses of Shammai and Hillel are reversed. The Babli starts: “When they brought to them oil and wine …” meaning that it was brought in the middle of the dinner for enjoyment. This is the opinion of R. Abraham ben David. According to Maimonides (Berakhot 7:14), wine and spiced oil were brought after dinner, to recite Grace over them. According to Rashi, this wine was brought after Grace had already been recited. House of Shammai say, the cup in his right hand and perfumed oil¹⁰⁹As an air freshener. in his left hand; first he says the benediction over the cup and then over the perfumed oil. The House of Hillel say, perfumed oil in his right hand and the cup in his left hand, he recites the benediction over the perfumed oil and rubs it on the head of the waiter¹¹⁰To have some use for it since he must get rid of the perfumed oil in order not to walk around perfumed.. But if the waiter was learned, he would rub it on the wall because it does no credit¹¹¹The Babli is more explicit and calls it “a shame.” to the learned to walk around perfumed.