Healing prayer for My Grandfather

I humbly ask for your prayers for my grandfather, who has a kidney stone. He is in the hospital for his treatment. Pray that his condition will be okay because our grandmother is waiting for him. They are not used to being separated from each other. Because they were always together until they grew old, pray that they will be given the strength to resist whatever test the Lord gives them.
Thank you so much! and God bless us all.