فَمَا زَالَت تِّلْكَ دَعْوَىٰهُمْ حَتَّىٰ جَعَلْنَـٰهُمْ حَصِيدًا خَـٰمِدِينَ
And that declaration of theirs did not cease until We made them [as] a harvest [mowed down], extinguished [like a fire].
The Prophets
فَمَا زَالَت تِّلْكَ دَعْوَىٰهُمْ حَتَّىٰ جَعَلْنَـٰهُمْ حَصِيدًا خَـٰمِدِينَ
And that declaration of theirs did not cease until We made them [as] a harvest [mowed down], extinguished [like a fire].
Nearby ayahs help place verse 21:15 in sequence and meaning.
لَا تَرْكُضُوا۟ وَٱرْجِعُوٓا۟ إِلَىٰ مَآ أُتْرِفْتُمْ فِيهِ وَمَسَـٰكِنِكُمْ لَعَلَّكُمْ تُسْـَٔلُونَ
[Some angels said], "Do not flee but return to where you were given luxury and to your homes - perhaps you will be questioned."
قَالُوا۟ يَـٰوَيْلَنَآ إِنَّا كُنَّا ظَـٰلِمِينَ
They said, "O woe to us! Indeed, we were wrongdoers."
وَمَا خَلَقْنَا ٱلسَّمَآءَ وَٱلْأَرْضَ وَمَا بَيْنَهُمَا لَـٰعِبِينَ
And We did not create the heaven and earth and that between them in play.
لَوْ أَرَدْنَآ أَن نَّتَّخِذَ لَهْوًا لَّٱتَّخَذْنَـٰهُ مِن لَّدُنَّآ إِن كُنَّا فَـٰعِلِينَ
Had We intended to take a diversion, We could have taken it from [what is] with Us - if [indeed] We were to do so.