It is narrated from Sayyiduna Abu Sa'id al-Khudri (may Allah be pleased with him): "The Prophet (peace and blessings be upon him) would pray the Duha prayer with such constancy and regularity that one would think he would never leave it, and he would sometimes leave it so continuously that one would feel he would perhaps never pray it again."
[Takhrij: Imam al-Tirmidhi narrated it in his Sunan (477) and called it hasan gharib; however, the narrator in its chain, Atiyyah al-Awfi, is da'if (weak) according to the majority of hadith scholars, on account of which Allamah al-Albani graded it weak.]
Hadith Referenceالمطالب العالية بزوائد المسانيد الثمانية / كتاب النوافل / 660
Hadith Gradingمحدثین:إسناده ضعيف
Hadith Takhrij«حکم الحدیث المطالب العالیہ محققاً تنسیق د. سعد بن ناصر بن عبد العزيز الشَّثري- مکتبہ شاملہ :إسناده ضعيف. » «أخرجه الترمذي فى «جامعه» برقم: 477، وأحمد فى «مسنده» برقم: 11324، 11487، وأبو يعلى فى «مسنده» برقم: 1270، وعبد بن حميد فى "المنتخب من مسنده"، 891، وأورده ابن حجر فى "المطالب العالية"، 660، وأخرجه الترمذي فى "الشمائل"، 292»