أَخْبَرَنَا قُتَيْبَةُ بْنُ سَعِيدٍ، عَنْ مَالِكٍ، عَنْ نَافِعٍ، عَنِ ابْنِ عُمَرَ، أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم قَالَ لاَ يَتَحَرَّ أَحَدُكُمْ فَيُصَلِّيَ عِنْدَ طُلُوعِ الشَّمْسِ وَعِنْدَ غُرُوبِهَا "
It was narrated from Ibn 'Umar that the Messenger of Allah (ﷺ) said:
"No one of you should deliberately try to pray when the sun is rising, or when it is setting."
Reference: Sunan an-Nasa'i
English : Vol. 1, Book 6, Hadith 564
Arabic : Book 6, Hadith 568