وَعَنْهُ قَالَ: قَالَ رَسُولُ اَللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ -«أَثْقَلُ اَلصَّلَاةِ عَلَى اَلْمُنَافِقِينَ: صَلَاةُ اَلْعِشَاءِ، وَصَلَاةُ اَلْفَجْرِ، وَلَوْ يَعْلَمُونَ مَا فِيهِمَا لَأَتَوْهُمَا وَلَوْ حَبْوًا»
The Messenger of Allah (sallallahu alayhi wa sallam) said: “The most burdensome prayers for hypocrites are the Isha and the Fajr prayers and if they knew what (rewards) these (prayers) contain, they would have come to them (in the mosques), even though they had to crawl on their knees.”.
Bulugh al-Maram 481, Book 2, The Book of Prayer, Hadith 302. 1 min read