It is narrated from Sayyiduna Abdullah bin Umar (may Allah be pleased with them both) that when the Messenger of Allah (peace and blessings be upon him) had prayed Fajr, he would not get up from his place until the time of the (Ishraq) prayer came, and he (peace and blessings be upon him) said: "Whoever prays the morning prayer, then remains sitting in his place until the time of prayer comes (and he prays), it will be for him equal to an accepted Umrah and an accepted Hajj."
Imam al-Tabarani (may Allah have mercy on him) said: "No one narrated this hadith from Malik bin Mighwal except al-Fadl bin Muwaffaq."
Hadith Referenceالمعجم الأوسط / باب الميم / 5602
Hadith Gradingمحدثین:إسناده ضعيف لضعف الفضل بن موفق
Hadith Takhrij«قال الهيثمي: وفيه الفضل بن موفق وثقه ابن حبان وضعف حديثه أبو حاتم الرازي وبقية رجاله ثقات «مجمع الزوائد ومنبع الفوائد، ج 10، ص 105»»