Reference : Hisn al-Muslim 184

أَفْطَـرَ عِنْدَكُم الصّـائِمونَ
وَأَكَلَ طَعامَـكُمُ الأبْـرار،
وَصَلَّـتْ عَلَـيْكُمُ الملائِكَـة
Afṭara `indakumuṣ-ṣā'imūn, 
wa akala ṭa`āmakumu ‘l-'abrār, 
wa ṣallat `alaykumu ‘l-malā'ikah.


With you, those who are fasting have broken their fast, 
you have fed those who are righteous, 
and the angels recite their prayers upon you.

Reference:
Abu Dawud 3/367, Ibn Majah 1/556, An-Nasa'i, 'Amalul-Yawm wal-Laylah 296-8. 
Al-Albani graded it authentic in Sahih Abu Dawud 2/730.

Chapter: When breaking fast in someone’s home