Sunan an-Nasa'i, Volume 1, Book 6, Hadith 571 (DarusSalam)

It was narrated from Ibn Tawus that his father said: "'Aishah, may Allah be please with her, said: 'Umar, may Allah be please with him, is not correct, rather the Messenger of Allah only prohibited, as he said: 'Do no deliberately seek to pray when the sun is rising or when it is setting, for it rises between the horns of a Shaitan."

أَخْبَرَنَا مُحَمَّدُ بْنُ عَبْدِ اللَّهِ بْنِ الْمُبَارَكِ الْمُخَرِّمِيُّ، قَالَ حَدَّثَنَا الْفَضْلُ بْنُ عَنْبَسَةَ، قَالَ حَدَّثَنَا وُهَيْبٌ، عَنِ ابْنِ طَاوُسٍ، عَنْ أَبِيهِ، قَالَ قَالَتْ عَائِشَةُ رضى الله عنها أَوْهَمَ عُمَرُ - رضى الله عنه - إِنَّمَا نَهَى رَسُولُ اللَّهِ صلى الله عليه وسلم قَالَ ‏ "‏ لاَ تَتَحَرَّوْا بِصَلاَتِكُمْ طُلُوعَ الشَّمْسِ وَلاَ غُرُوبَهَا فَإِنَّهَا تَطْلُعُ بَيْنَ قَرْنَىْ شَيْطَانٍ ‏" ‏ ‏.‏

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also referenced under: Book 6, Hadith 575 (In-Book)