اللَّهُمَّ بَارِكْ لَهُمْ فِيمَا رَزَقْتَهُمْ، وَاغْفِرْ لَهُمْ وَارْحَمْهُمْ
Transliteration
Allahumma barik lahum fima razaqtahum, waghfir lahum warhamhum
English meaning
O Allah, bless them in what You have provided for them, forgive them and have mercy upon them.
When is it recited?
Recited for the host after eating at someone's home.
Source
Muslim, Ashriba 186, 2042