Send message to whatsapp group from node-red

Hay, I want to send a message to a whatsapp group, but i don't know how. I only know how to send a message to a personal number.
Is there anyone can do that ?
Please help

I don't think it is that easy. Most people around here, like myself, use Telegram.

Have a look at these threads...

this is something that depends on the whatsapp client (node) you are using. Only some of them can do what you saying you want.
Which node are you using?

I use this node node-red-contrib-whatsapp-cmb (node) - Node-RED