Do not intend to observe prayer at the time of the rising of the sun nor at its setting, for it rises between the horns of Satan. (Using translation from Muslim 828b)   

أَنَّ رَسُولَ اللهِ ﷺ قَالَ «لَا تَتَحَرَّوْا بِصَلَاتِكُمْ طُلُوعَ الشَّمْسِ وَلَا غُرُوبَهَا فَإِنَّهَا تَطْلُعُ بَيْنَ قَرْنَيْ شَيْطَانٍ وَتَغْرُبُ بَيْنَ قَرْنَيْ شَيْطَانٍ»