The Prophet (may Allah's peace and blessings be upon him) did not observe a voluntary prayer more regularly than the two Rak‘ahs of Fajr
Chapter: It is recommended to pray two rak`ah for the sunnah of Fajr. And encouragement to pray them regularly, and to make them brief, and to persist in offering them, and clarifying what is recommended to recite therein
Authentic
hadith of Sahih Muslim
Sahih Muslim 724f
The Mother of the Believers, ‘Ā’ishah (may Allah be pleased with her), reported that the Prophet (may Allah's peace and blessings be upon him) was never more consistent, diligent, and careful in performing any voluntary prayer than he was with the two Sunnah Rak‘ahs before the Fajr prayer.
Lessons
Voluntary prayers refer to all prayers beyond the obligatory ones. Here, it specifically means the regular Sunnah prayers associated with the obligatory prayers.
The regular Sunnah prayers are: two Rak‘ahs before Fajr, four Rak‘ahs before Zhuhr and two after it, two Rak‘ahs after Maghrib, and two Rak‘ahs after ‘Ishā’.
The regular Sunnah prayer before Fajr is to be prayed both in residence and during travel, unlike the Sunnah prayers for Zhuhr, Maghrib, and ‘Ishā’, which are only prayed when resident.
The two Sunnah Rak‘ahs before Fajr are strongly recommended, and they should not be neglected.
Explanation in Arabic
أخبرت أم المؤمنين عائشة رضي الله عنها أن النبي صلى الله عليه وسلم لم يكن على شيء من النوافل أشد تعاهدًا وحرصًا ومحافظة منه على ركعتي الراتبة قبل صلاة الفجر.
نوافل الصلاة هي ما سوى الفرائض من الطاعات، والمراد هنا: السنن الرواتب التابعة للفرائض.
السنن الرواتب: ركعتان قبل الفجر، وأربع ركعات قبل الظهر واثنتان بعدها، وركعتان بعد المغرب، وركعتان بعد العشاء.
راتبة الفجر تصلى في الحضر والسفر، بخلاف راتبة الظهر والمغرب والعشاء فلا تصلى إلا في الحضر.
الاستحباب المؤكد في ركعتي الفجر، فلا ينبغي إهمالهما.
