Hadithcore
Mishkat al-Masabih, 629

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.)

وَعَنْهُ قَالَ: قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ: «لَيْسَ صَلَاةً أَثْقَلَ عَلَى الْمُنَافِق مِنَ الْفَجْرِ وَالْعِشَاءِ وَلَوْ يَعْلَمُونَ مَا فِيهِمَا لأتوهما وَلَو حبوا»

References1 variant
In-Book Reference
Book 4, Hadith 63