Full Sharh — Riyad as-Salihin 588
وعن أنس رضي الله عنه أن النبي صلى الله عليه وسلم جاء إلى سعد بن عبادة رضي الله عنه فجاء بخبز وزيت، فأكل ثم قال النبي صلى الله عليه وسلم: "أفطر عندكم الصائمون وأكل طعامكم الأبرار وصلت عليكم الملائكة". ((رواه أبو داود بإسناد صحيح)).
English Translation
Anas (May Allah be pleased with him) reported:: The Prophet (ﷺ) came to visit Sa'd bin 'Ubadah (May Allah be pleased with him) who presented bread and olive oil to him. The Prophet (ﷺ) ate it and said, "The observers of fast have broken their fast with you (this is the literal translation, but the meaning is: 'May Allah reward you for providing a fasting people with food to break their fast'); the pious people have eat your food and the angels invoked blessings on you.".
Source
Riyad as-Salihin(رياض الصالحين)
The Book of Virtues
Hadith Number
588