Abu Hurairah reported the Messenger of Allah ﷺ as saying: If anyone says a rak'ah of the Asr prayer before sunset, he has observed (the Asr prayer), and if anyone performs a rak'ah of the Fajr prayer before sunrise, he has observed (the Fajr prayer).
Hadith Referenceسنن ابي داود / كتاب الصلاة / 412
Hadith Gradingالألبانی:صحيح | زبیر علی زئی:صحيح مسلم (608)
Narrated Kab ibn Malik: I said: Messenger of Allah, to make my atonement complete I should divest myself of my all property as sadaqah (alms) for Allah and His Messenger. He said: No. I said: The half of it. He said: No. I said: Then a third of it. He said: Yes. I said: I shall retain the portion I have at Khaybar.
Hadith Referenceسنن ابي داود / كتاب الأيمان والنذور / 3321
Hadith Gradingالألبانی:حسن صحيح | زبیر علی زئی:حسن, انظر الحديث السابق (3317)
Hadith Takhrij« انظر ما قبلہ، انظر رقم (2202)، (تحفة الأشراف: 11135) (حسن صحیح) »