Sad
كِتَـٰبٌ أَنزَلْنَـٰهُ إِلَيْكَ مُبَـٰرَكٌ لِّيَدَّبَّرُوٓا۟ ءَايَـٰتِهِۦ وَلِيَتَذَكَّرَ أُو۟لُوا۟ ٱلْأَلْبَـٰبِ
[This is] a blessed Book which We have revealed to you, [O Muhammad], that they might reflect upon its verses and that those of understanding would be reminded.
Nearby ayahs help place verse 38:29 in sequence and meaning.
وَمَا خَلَقْنَا ٱلسَّمَآءَ وَٱلْأَرْضَ وَمَا بَيْنَهُمَا بَـٰطِلًا ۚ ذَٰلِكَ ظَنُّ ٱلَّذِينَ كَفَرُوا۟ ۚ فَوَيْلٌ لِّلَّذِينَ كَفَرُوا۟ مِنَ ٱلنَّارِ
And We did not create the heaven and the earth and that between them aimlessly. That is the assumption of those who disbelieve, so woe to those who disbelieve from the Fire.
أَمْ نَجْعَلُ ٱلَّذِينَ ءَامَنُوا۟ وَعَمِلُوا۟ ٱلصَّـٰلِحَـٰتِ كَٱلْمُفْسِدِينَ فِى ٱلْأَرْضِ أَمْ نَجْعَلُ ٱلْمُتَّقِينَ كَٱلْفُجَّارِ
Or should we treat those who believe and do righteous deeds like corrupters in the land? Or should We treat those who fear Allah like the wicked?
وَوَهَبْنَا لِدَاوُۥدَ سُلَيْمَـٰنَ ۚ نِعْمَ ٱلْعَبْدُ ۖ إِنَّهُۥٓ أَوَّابٌ
And to David We gave Solomon. An excellent servant, indeed he was one repeatedly turning back [to Allah].
إِذْ عُرِضَ عَلَيْهِ بِٱلْعَشِىِّ ٱلصَّـٰفِنَـٰتُ ٱلْجِيَادُ
[Mention] when there were exhibited before him in the afternoon the poised [standing] racehorses.