In the opening section of Parashat Toledot, we read of the transfer of the birthright from Esav to Yaakov, which Yaakov demanded in response to Esav's request that he feed him some of the food he was preparing. The Torah tells that Esav returned from the field and said to Yaakov, "Hal'iteini na" – "please pour for me" some of the food. Rashi explains the word hal'iteini as referring to the pouring of large amounts of food directly into someone else's mouth. He cites a Mishna in Masekhet Shabbat (155b) which employs this term in reference to feeding a camel.
