Of the guest for the host1 du'a

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

Reference:Muslim 3/1615.Hisnul Muslim 182

اللّهُـمَّ بارِكْ لَهُمْ فيما رَزَقْـتَهُم وَاغْفِـرْ لَهُـمْ وَارْحَمْهُمْ

Transliteration

Allāhumma bārik lahum fī mā razaqtahum. wagh’fir lahum warḥamhum.

Translation

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