Bhikkhus, this Kassapa is content with any kind of almsfood, and he speaks in praise of contentment with any kind of almsfood, and he does not engage in a wrong search, in what is improper, for the sake of a almsfood. If he does not get almsfood he is not agitated, and if he gets it he uses it without being tied to it, uninfatuated with it, not blindly absorbed in it, seeing the danger in it, understanding the escape. ...
Therefore, bhikkhus, you should train yourselves thus: 'We will be content with any kind of almsfood, and we will speak in praise of contentment with any kind of almsfood, and we will not engage in a wrong search, in what is improper, for the sake of almsfood. If we do not get almsfood we will not be agitated, and if we get it we will use it without being tied to it, uninfatuated with it, not blindly absorbed in it, seeing the danger in it, understanding the escape.'
Gautama Buddha, Samyutta Nikaya, as translated by B. Bodhi (2000), p. 662