Dua when breaking fast in someone’s home
أَفْطَـرَ عِنْـدَكُمُ الصّائِمـون، وَأَكَلَ طَعامَكُـمُ الأبْـرار،...
أَفْطَـرَ عِنْـدَكُمُ الصّائِمـون، وَأَكَلَ طَعامَكُـمُ الأبْـرار، وَصَلَّـتْ عَلَيْـكُمُ الملائِكَـة
Aftara AAindakumus-sa-imoon, wa-akala taAAamakumul-abrar, wasallat AAalaykumul-mala-ikah
Translation
May those who are fasting break their fast with you, and may the righteous eat your food, and may the angels send prayers upon you.
When to recite
Said by a guest who is fasting when breaking fast in someone's home.
Source / Reference
Abu Dawud 3/367, Ibn Majah 1/556