I mourn with you your family's loss. Praying for your family to feel the comfort of your community here, your faith community (where ever you worship) and from God Himself.
When I have trouble with words to say, often a song (or two ) says it better:
Here are two that helped me through losses:
https://www.youtube.com/watch?v=092CEy0PR-E (Barocha - Michael Card)
This one is bittersweet, but sometimes those feelings need to be expressed too:
https://www.youtube.com/watch?v=mvcEEk_HELw (Maranatha: Michael Card)
(BTW, this was what my husband and I put on the tombstone of a still- born daughter (Maranatha)- I still can't hear this w/o tears - but sometimes that's what we need)
I mourn with you your family's loss. Praying for your family to feel the comfort of your community here, your faith community (where ever you worship) and from God Himself.