A letter of condolence to your friend on the death of his mother.
Dear Ali,
I'm really sorry to hear about your mom passing away, as you told me in your letter. I hope her soul finds peace forever. I know it's a really big loss that can't be fixed. It must be so tough for you, especially since you're still young. But sometimes things happen that we can't control.
Your dad must be feeling really sad too. I hope and pray that you all find the strength to handle this and stay patient through these tough times. I'm truly sorry for what you're going through.
Please let your dad and your other family members know that I'm thinking of them. I'll come to visit you in a day or two.
Take care,
[X.Y.Z.]