Hadith 13174

(حديث مرفوع) حَدَّثَنَا رَوْحٌ ، حَدَّثَنَا حَمَّادٌ ، عَنْ ثَابِتٍ ، عَنْ أَنَسِ بْنِ مَالِكٍ ، أَنّ النَّبِيَّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ " كَانَ يَصُومُ حَتَّى يُقَالَ : قَدْ صَامَ ، وَيُفْطِرُ حَتَّى يُقَالَ : قَدْ أَفْطَرَ " .
It is narrated from Hazrat Anas (may Allah be pleased with him) that when the Prophet (peace and blessings be upon him) intended to fast, people would inform each other that the Prophet (peace and blessings be upon him) had made the intention to fast, and when he broke his fast, people would also inform each other that the Prophet (peace and blessings be upon him) had broken his fast.
Hadith Reference مسند احمد / مسند المكثرين من الصحابة / 13174
Hadith Grading حکم دارالسلام: إسناده صحيح، خ: 1141، م:1158