Children are a gift from Allaah and they are the adornment of the worldly life

Allaah says:

"O mankind, fear your Lord who created you from a single soul (Aadam), and from that, He created his wife, and from them, He created many men and women." [Surah AnNisaa: 1]

And He says:

"And Allaah has made for you wives from amongst your own kind, and has made for you from your wives, sons and grandsons. He has bestowed on you good provision."
[Surah An-Nahl: 72]

He, may He be Blessed and Exalted, says:

"To Allaah belongs the dominion of the heavens and the earth. He creates what He wills. He bestows female offspring upon whom He wills and bestows male offspring upon whom He wills. Or He bestows both males and females, and He renders barren whom He wills. Verily, He is the All-Knower and Able to do all things." [Surah Ash-Shooraa: 49-50]

Children are also the adornment of the worldly life. Allaah says:

"Wealth and children are the adornment of the life of this world. But the good righteous deeds that last are better with your Lord for rewards and better in respect of hope."
[Surah Al-Kahf: 46]