How to send a text message to express my condolences after my friend's father died?

Better spend more time with him. Talking to him next to him is more important than anything else. Sending messages can only make him more sad. If you just send messages, don't. If your actual situation is inconvenient, it is more important to give him a call and say hello. I don't know what to say when sending messages. Don't bring up the topic of his father's death on the phone. When a person is sad, as long as he is a friend, a greeting is better than everything!