Proud of having many children

وَكَانَ لَهُۥ ثَمَرٌۭ فَقَالَ لِصَٰحِبِهِۦ وَهُوَ يُحَاوِرُهُۥٓ أَنَا۠ أَكْثَرُ مِنكَ مَالًۭا وَأَعَزُّ نَفَرًۭا

(Abundant) was the produce this man had : he said to his companion, in the course of a mutual argument: "more wealth have I than you, and more honour and power in (my following of) men."

ٱعْلَمُوٓا۟ أَنَّمَا ٱلْحَيَوٰةُ ٱلدُّنْيَا لَعِبٌۭ وَلَهْوٌۭ وَزِينَةٌۭ وَتَفَاخُرٌۢ بَيْنَكُمْ وَتَكَاثُرٌۭ فِى ٱلْأَمْوَٰلِ وَٱلْأَوْلَٰدِ ۖ كَمَثَلِ غَيْثٍ أَعْجَبَ ٱلْكُفَّارَ نَبَاتُهُۥ ثُمَّ يَهِيجُ فَتَرَىٰهُ مُصْفَرًّۭا ثُمَّ يَكُونُ حُطَٰمًۭا ۖ وَفِى ٱلْءَاخِرَةِ عَذَابٌۭ شَدِيدٌۭ وَمَغْفِرَةٌۭ مِّنَ ٱللَّهِ وَرِضْوَٰنٌۭ ۚ وَمَا ٱلْحَيَوٰةُ ٱلدُّنْيَآ إِلَّا مَتَٰعُ ٱلْغُرُورِ

Know ye (all), that the life of this world is but play and amusement, pomp and mutual boasting and multiplying, (in rivalry) among yourselves, riches and children. Here is a similitude: How rain and the growth which it brings forth, delight (the hearts of) the tillers; soon it withers; thou wilt see it grow yellow; then it becomes dry and crumbles away. But in the Hereafter is a Penalty severe (for the devotees of wrong). And Forgiveness from Allah and (His) Good Pleasure (for the devotees of Allah). And what is the life of this world, but goods and chattels of deception?

أَلْهَىٰكُمُ ٱلتَّكَاثُرُ

The mutual rivalry for piling up (the good things of this world) diverts you (from the more serious things),