Feed Only the Pious
Abu Said Al-Khudri (radi Allahu anhu) reported that the Prophet (sal Allahu alaihi wa sallam) said, “Keep only a believer for a companion and let only a pious eat your food.”
[At-Tirmidhi and Abu Dawud]
This Hadith forbids Muslims from befriending infidels and stresses that they should establish a bond of friendship and fraternity with the pious persons only.
The above Hadith signifies that taking believers for company has good consequences on the Muslim. While feeding only pious people compels the Muslim host to provide only Halal or lawful foodstuff for his household as well as his guests.
And Allah Knows Best!