Bismillah Walhamdulillah Was Salaatu Was Salaam ‘ala Rasulillah Narrated Abu Mas’ud (Radi-Allahu ‘anhu):

There was an Ansari man called Abu Shu’aib who had a slave butcher. Abu Shu’aib said to him, “Prepare a meal sufficient for five persons so that I might invite the Prophet (Sallallahu ‘Alaihi Wa Sallam) besides other four persons.” Abu Shu’aib had seen the signs of hunger on the face of the Prophet (Sallallahu ‘Alaihi Wa Sallam) and so he invited him. Another man who was not invited, followed the Prophet (Sallallahu ‘Alaihi Wa Sallam).

The Prophet (Sallallahu ‘Alaihi Wa Sallam) said to Abu Shu’aib, “This man has followed us. Do you allow him to share the meal?”

Abu Shu’aib said, “Yes.”

Bukhari Vol. 3 : No. 636