BUKHARI 2456:
from a man from al-Anṣār —
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 ﷺ besides other four persons." Abu Shu'aib had seen the signs of hunger on the face of the Prophet ﷺ and so he invited him. Another man who was not invited, followed the Prophet. The Prophet ﷺ said to Abu Shu'aib, "This man has followed us. Do you allow him to share the meal?" Abu Shu'aib said, "Yes."
البخاري ٢٤٥٦:
عن ا من عن الانصار —
يُقَالُ لَهُ أَبُو شُعَيْبٍ كَانَ لَهُ غُلاَمٌ لَحَّامٌ فَقَالَ لَهُ أَبُو شُعَيْبٍ اصْنَعْ لِي طَعَامَ خَمْسَةٍ لَعَلِّي أَدْعُو النَّبِيَّ ﷺ خَامِسَ خَمْسَةٍ وَأَبْصَرَ فِي وَجْهِ النَّبِيِّ ﷺ الْجُوعَ فَدَعَاهُ فَتَبِعَهُمْ رَجُلٌ لَمْ يُدْعَ فَقَالَ النَّبِيُّ ﷺ إِنَّ هَذَا قَدِ اتَّبَعَنَا أَتَأْذَنُ لَهُ قَالَ نَعَمْ