Related for Pesachim 178:3
ת"ש הממנה אחרים עמו על חלקו רשאין [בני חבורה] ליתן לו את שלו והוא אוכל את שלו והן אוכלין את שלהן מאי טעמא לאו משום דהוי ליה כידים של אחד מהן יפות ואי סלקא דעתך ידיו יפות מצי אמר להו קבילתון ניהוי האי כידיו יפות
but we did not accept you with the view that you should eat more than we'? - Come and hear: IF A MAN REGISTERS ANOTHER WITH HIM, THE MEMBERS OF THE COMPANY ARE AT LIBERTY TO GIVE HIM HIS [PORTION], AND HE EATS HIS AND THEY EAT THEIR'What is the reason? Is it not because it is as though one of them were quick-handed:<span class="x" onmousemove="('comment',' Presumably the two will eat more than the ordinary share of one.');"><sup>7</sup></span> and if you should think that one who is quick-handed can say to them, 'You have accepted me,'<span class="x" onmousemove="('comment',' Enabling me to eat as much as I like.');"><sup>8</sup></span>