What to say to someone terminally ill?

To make a long story short an old friend from college and his wife recently announced that she is terminally ill. She’s in her late 20s. This guy is going to be a widower by the time he’s 32. It’s truly horrible. I’ve never met the wife and the husband and I haven’t spoken in probably years. I only have good things to say about John and I think the feeling is mutual. He’s always been a stand up guy its just after college our lives went separate directions.

I feel compelled to reach out. Any thoughts on what to say? John is a decently religious Christian guy so I think something along the lines of quoting tehillim would be appreciated. My goal here is to say “hey thinking about you and your family during this terrible time.”