عَن عمَارَة بن روبية قَالَ: سَمِعْتُ رَسُولَ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ يَقُولُ: «لَنْ يَلِجَ النَّارَ أَحَدٌ صَلَّى قَبْلَ طُلُوعِ الشَّمْسِ وَقَبْلَ غُرُوبِهَا» يَعْنِي الْفَجْرَ وَالْعصر. (رَوَاهُ مُسلم)

He also reported God’s Messenger as saying, "No prayer is more burdensome to the hypocrites than the dawn and the evening prayer; but if they know what blessing lies in them, they would come to them even if they had to crawl to do so.” (Bukhari and Muslim.)