Hadith

The holy Prophet (pbuh)

من قامَ لَيلَتَيِ العيدَينِ مُحتَسِبا للّهِِ ، لَم يَمُت قَلبُهُ يَومَ تَموتُ القُلوبُ

If a person has stayed up on the nights of the two Eids (al-Fitr & al-Adha) to worship Allah, hoping for the reward thereof, his heart will not die on the day when hearts die

Kanz al-Ummal, v 8 ,p 548