Mishkat al-Masabih #4073

'Uqba b. 'Amir told that he said to the Prophet, "You send us out and we come to people who do not give us hospitality, so what is your opinion?" He replied, "If you come to people who order for you what is fitting for a guest accept it; but if they do not, take from them what is fitting for them to give to a guest." (Bukhari and Muslim.)