Prayer will be a source of light on the Day of Judgement

from to the Prophet ﷺ that he mentioned the Salah (prayer) one day and said, "Whoever preserves it, it will be a source of light, proof, and salvation for him on the Day of Judgment. And whoever does not preserve it, he will not have any light, proof, or salvation. He will be with Qarun, Pharaoh, Haman, and Ubay b. Khalaf on the Day of Judgment."

عَنِ النَّبِيِّ ﷺ أَنَّهُ ذَكَرَ الصَّلَاةَ يَوْمًا فَقَالَ مَنْ حَافَظَ عَلَيْهَا كَانَتْ لَهُ نُورًا وَبُرْهَانًا وَنَجَاةً يَوْمَ الْقِيَامَةِ، وَمَنْ لَمْ يُحَافِظْ عَلَيْهَا لَمْ يَكُنْ لَهُ نُورٌ وَلَا بُرْهَانٌ وَلَا نَجَاةٌ، وَكَانَ يَوْمَ الْقِيَامَةِ مَعَ قَارُونَ وَفِرْعَوْنَ وَهَامَانَ وَأُبَيِّ بْنِ خَلَفٍ