Text conversations

• Firmly press on one of the messages in the conversation
• Choose "More ..." from the pop-up at the bottom.
• Tap on each message you wish to forward, causing a check mark to appear to its left.
• Press the curved arrow in the lower right.
• Address and send the resulting message.

what i meant was that it would have to be connected (signed in) to the same apple id. but i think i might have misunderstood. if you want all of your texts forwarded to the device then you would use my advice. but if you do want just one message, then you would want to look at sberman's post

Don't pay attention to that post, it will not accomplish what you want to do, use the sage advice that sberman provided.

Glad that answered your question.

And thanks to deggie for your kind remarks.

On your phone go into settings > messages > text message forwarding. There, turn on whichever device (must be connected to same Apple ID) you’d like.