Prophet (SAW)'s Prayers When leaving the residence of the host

Recite:

اللَّهُمَّ بَارِكْ لَهُمْ فِيمَا رَزَقْتَهُمْ وَاغْفِرْ لَهُمْ وَارْحَمْهُمْ

"O Allah, grant him Your blessings in his sustenance, forgive him and have mercy on him". (Mishkat)