[Your Name, & Address here]
[Recipient Name & address here]
I know what you are going through at this time. It is really a very hard time for your whole family.
You lost your lovely child. Death of a child is so hard to accept for all parents. No one can imagine seeing their child dying in front of their eyes. I can feel your pain, and my heart goes out to you in this sorrowful time.
You are always in my thoughts. I pray God to give you courage to go through this phase.
Please accept my deepest sympathies and condolences on your loss.