Sayyiduna Jabir bin Abdullah (may Allah be pleased with them both) reports: When the Prophet (peace and blessings of Allah be upon him) performed the morning prayer, he would remain seated there until the sun had risen, continuing to remember Allah.
Hadith Referenceمعجم صغير للطبراني / كتاب الصلوٰة / 335
Hadith Gradingمحدثین:صحيح
Hadith Takhrij«أخرجه مسلم فى «صحيحه» برقم: 670، 2322، وابن خزيمة فى «صحيحه» برقم: 757، وابن حبان فى «صحيحه» برقم: 2028، والنسائي فى «المجتبیٰ» برقم: 1355، 1356، والنسائي فى «الكبریٰ» برقم: 1282، وأبو داود فى «سننه» برقم: 1294، 4850، والترمذي فى «جامعه» برقم: 585، 2850، والبيهقي فى«سننه الكبير» برقم: 3070، وأحمد فى «مسنده» برقم: 21142، ، والترمذي فى «الشمائل» برقم: 247، والطبراني فى«الكبير» برقم: 1789، والطبراني فى «الأوسط» برقم: 1608، 7031، والطبراني فى «الصغير» برقم: 1189»
Jabir bin Samurah said: When the Prophet ﷺ prayed the dawn prayer, he sat cross-legged where he was till the sun had come well up.
Shaykh Umar Farooq Saeedi
Benefits and Issues: ➊ In general circumstances, sitting cross-legged is permissible; even a sick person may sit in this manner while performing prayer. However, for eating, some scholars have considered sitting in this way to be disliked (makruh), and their reasoning is that this manner of sitting can fall under the category of reclining, and eating while reclining is prohibited.
➋ It is recommended (mustahabb) that a person remain seated in the mosque after the Fajr prayer until sunrise, engaging in remembrance (dhikr), glorification (tasbih), recitation, and other acts related to the Qur'an.
Source: Sunan Abu Dawood – Commentary by Shaykh Umar Farooq Saeedi, Page: 4850