Isha and Fajr: the test of sincerity

The hardest prayers for the hypocrites are Isha and Fajr.

Narrated by Abu Hurairah

No prayer is heavier on the hypocrites than Fajr and Isha. If they knew what is in them, they would come to them even if they had to crawl.

Sahih al-Bukhari 657, Sahih Muslim 651

What this hadith teaches

Isha and Fajr come when people are tired or asleep and few see who attends. That is why they reveal sincerity.

Reference and grade

Grade
Sahih: agreed upon by al-Bukhari and Muslim
Narrator
Abu Hurairah

The hadith in Arabic نص الحديث

لَيْسَ صَلاَةٌ أَثْقَلَ عَلَى الْمُنَافِقِينَ مِنَ الْفَجْرِ وَالْعِشَاءِ، وَلَوْ يَعْلَمُونَ مَا فِيهِمَا لأَتَوْهُمَا وَلَوْ حَبْوًا، لَقَدْ هَمَمْتُ أَنْ آمُرَ الْمُؤَذِّنَ فَيُقِيمَ، ثُمَّ آمُرَ رَجُلاً يَؤُمُّ النَّاسَ، ثُمَّ آخُذَ شُعَلاً مِنْ نَارٍ فَأُحَرِّقَ عَلَى مَنْ لاَ يَخْرُجُ إِلَى الصَّلاَةِ بَعْدُ

Arabic text of Sahih al-Bukhari 657, as given on sunnah.com.