Ibn Kathir writes in his commentary on Surah Al-Baqarah:
Allah Almighty said:
يَا أَيُّهَا النَّاسُ اعْبُدُوا رَبَّكُمُ الَّذِي خَلَقَكُمْ وَالَّذِينَ مِن قَبْلِكُمْ لَعَلَّكُمْ تَتَّقُونَ الَّذِي جَعَلَ لَكُمُ الْأَرْضَ فِرَاشًا وَالسَّمَاءَ بِنَاءً وَأَنزَلَ مِنَ السَّمَاءِ مَاءً فَأَخْرَجَ بِهِ مِنَ الثَّمَرَاتِ رِزْقًا لَّكُمْ ۖ فَلَا تَجْعَلُوا لِلَّهِ أَندَادًا وَأَنتُمْ تَعْلَمُونَ
O mankind, worship your Lord, who created you and those before you, that you may become righteous, who made for you the earth as a bed and the sky as a ceiling and sent down from the sky, rain and brought forth thereby fruits as provision for you. So do not attribute to Allah equals while you know. [Surah Al-Baqarah 2:21-22]
Several scholars like Ar-Razi and others, used this verse as an argument for the existence of the Creator, and it is a most worthy method of argument. Indeed, whoever ponders over the things that exist, the higher and lower creatures, their various shapes, colors, behavior, benefits and ecological roles, then he will realize the ability, wisdom, knowledge, perfection and majesty of the Creator. Once a desert Arab was asked about the evidence of Allah’s existence, so he responded:
يَا سُبْحَانَ اللَّهِ إِنَّ الْبَعْرَةَ لَتَدُلُّ عَلَى الْبَعِيرِ وَإِنَّ أَثَرَ الْأَقْدَامِ لَتَدُلُّ عَلَى الْمَسِيرِ فَسَمَاءٌ ذَاتُ أَبْرَاجٍ وَأَرْضٌ ذَاتُ فِجَاجٍ وَبِحَارٌ ذَاتُ أَمْوَاجٍ أَلَا يَدُلُّ ذَلِكَ عَلَى وُجُودِ اللَّطِيفِ الْخَبِيرِ
O, glory be to Allah! The camel’s dung testifies to the existence of the camel, and the track testifies to the fact that someone was walking. A sky that holds the stars, a land that has fairways and a sea that has waves? Does not all of this testify to the existence of the Most Kind, Most Knowledgeable?
Hence, whoever gazes at the sky in its immensity, its expanse, and the various kinds of planets in it, some of which appear stationary in the sky – whoever gazes at the seas that surround the land from all sides, and the mountains that were placed on the earth to stabilize it, so that whoever lives on land, whatever their shape and color, are able to live and thrive – whoever reads Allah’s statement:
أَلَمْ تَرَ أَنَّ اللَّهَ أَنزَلَ مِنَ السَّمَاءِ مَاءً فَأَخْرَجْنَا بِهِ ثَمَرَاتٍ مُّخْتَلِفًا أَلْوَانُهَا ۚ وَمِنَ الْجِبَالِ جُدَدٌ بِيضٌ وَحُمْرٌ مُّخْتَلِفٌ أَلْوَانُهَا وَغَرَابِيبُ سُودٌ وَمِنَ النَّاسِ وَالدَّوَابِّ وَالْأَنْعَامِ مُخْتَلِفٌ أَلْوَانُهُ كَذَٰلِكَ ۗ إِنَّمَا يَخْشَى اللَّهَ مِنْ عِبَادِهِ الْعُلَمَاءُ ۗ إِنَّ اللَّهَ عَزِيزٌ غَفُورٌ
Do you not see that Allah sends down rain from the sky, and We produce thereby fruits of varying colors? And in the mountains are tracts, white and red of varying shades and some extremely black. And among people and moving creatures and grazing livestock are various colors similarly. Only those fear Allah, from among His servants, who have knowledge. Indeed, Allah is Exalted in Might and Forgiving. [Surah Al-Fatir 35:27-28]
Whoever thinks about the running rivers that travel from area to area bringing benefit, whoever ponders over what Allah has created on earth; various animals and plants of different tastes, scents, shapes and colors that are a result of unity between land and water. Whoever thinks about all of this then he will realize that these facts testify to the existence of the Creator, His perfect ability, wisdom, mercy, kindness, generosity and His overall compassion for His creation. There is no deity worthy of worship except Allah, nor is there a Lord besides Him, upon Him we rely and to Him we turn in repentance. There are numerous verses in the Quran on this subject.