Dua by the guest for the host

اَللّٰهُمَّ بَارِكْ لَهُمْ فِيْمَا رَزَقْتَهُمْ، وَاغْفِرْ لَهُمْ وَارْحَمْهُمْ

O Allah, bless them in what You have provided for them, and forgive them and have mercy on them.

Allaahumma baarik lahum feemaa razaqtahum, waghfir lahum warhamhum.