19:59
۞ فَخَلَفَ مِنۢ بَعْدِهِمْ خَلْفٌ أَضَاعُوا۟ ٱلصَّلَوٰةَ وَٱتَّبَعُوا۟ ٱلشَّهَوَٰتِ ۖ فَسَوْفَ يَلْقَوْنَ غَيًّا
But there came after them successors who neglected prayer and pursued desires; so they are going to meet evil -
Translation · Saheeh International
Tafsir
Ibn Kathīr (abridged)
They were succeeded by Wicked People and Good People
After Allah mentioned the party of blessed ones -- the Prophets and those who followed them by maintainig the limits set by Allah and His commandments, fulfilling what Allah ordered and avoiding His prohibitions -- then He mentions,
(خَلَفَ مِنْ بَعْدِهِمْ خَلْفٌ) (there has succeeded them a posterity.) This means later generations.
أَضَاعُواْ الصَّلَـوةَ
(who have lost Salah) Losing their prayers is when they do not consider the prayers obligatory. Therefore they lose, because the prayer is the pillar and foundation of the religion. It is the best of the servants' deeds. Thus, these people will occupy themselves with worldly desires and delights, and they will be pleased with the life of this world. They will be tranquil and at ease in the worldly appetites. Therefore, these people will meet with Ghaiy, which means loss on the Day of Resurrection. Al-Awza`i reported from Musa bin Sulayman, who reported from Al-Qasim bin Mukhaymirah that he said concerning Allah's statement,
فَخَلَفَ مِن بَعْدِهِمْ خَلْفٌ أَضَاعُواْ الصَّلَـوةَ