5:58
وَإِذَا نَادَيْتُمْ إِلَى الصَّلاَةِ اتَّخَذُوهَا هُزُواً وَلَعِباً ذَلِكَ بِأَنَّهُمْ قَوْمٌ لاَّ يَعْقِلُونَ
When ye proclaim your call to prayer they take it (but) as mockery and sport; that is because they are a people without understanding.
23:21
وَإِنَّ لَكُمْ فِي الْأَنْعَامِ لَعِبْرَةً نُّسقِيكُم مِّمَّا فِي بُطُونِهَا وَلَكُمْ فِيهَا مَنَافِعُ كَثِيرَةٌ وَمِنْهَا تَأْكُلُونَ
And in cattle (too) ye have an instructive example: from within their bodies We produce (milk) for you to drink; there are, in them, (besides), numerous (other) benefits for you; and of their (meat) ye eat;
24:44
يُقَلِّبُ اللَّهُ اللَّيْلَ وَالنَّهَارَ إِنَّ فِي ذَلِكَ لَعِبْرَةً لِّأُوْلِي الْأَبْصَارِ
It is Allah Who alternates the Night and the Day: verily in these things is an instructive example for those who have vision!