Condolence: Words cannot begin to express the sadness you must be feeling. It seems so unfair that death should have the power to take away someone you love, especially a precious child. When it happens, the thought of never again being able to talk to, laugh with, or hold your loved one can be most difficult to bear. But please know that your Heavenly Father understands your pain. He, too, felt pain when his only begotten son died. And just like he raised his son, Jesus Christ, to life, he promised to do the same for our dead loved ones. Hosea 13:14 says, "From the power of the Grave I will redeem them;From death I will recover them. Where are your stings, O Death? Where is your destructiveness, O Grave? "
I hope that you find measure of comfort in God's promise to end all suffering and death soon and forever as the Bible promises at Revelation 21:4 "With that I heard a loud voice from the throne say:"Look! the tent of God is with mankind, and he will reside with them,and they will be his people .And God himself will be with them.And he will wipe out every tear from their eyes, and death will be no more , neither will mourning nor outcry nor pain be anymore. The former things have passed away."
Please see jw.org for more comfort from the Bible.