Boasting and competition in wealth and having more children. Allah says Know that this worldly life is no more than play, amusement, luxury, mutual boasting, and competition in wealth and children. 57 : 20 Al qurtubi commented: لأن عادة الجاهلية أن تتكاثر بالأبناء والأموال، وتكاثر المؤمنين بالإيمان والطاعة. For the custom of the pre-Islamic Arabs was to compete / Boast in their children and wealth, while the believers compete in their faith and obedience. (Tafsir al Qurtubi Surah al Hadid verse 20) - They have a nice car, so you buy an even better one. - They spent a lot on their wedding, so you spend even more. It's a never-ending cycle of trying to outdo others, and it can lead to unnecessary spending, stress, and unhappiness.