Q: Retrieve number from messages

Hello Dannie8669,

It sounds like you are trying to get some messages you had on another device over to another device. The the only way to restore all the messages that were in the Messages app is to restore a backup of the device that had them to the device you want to have them on:

Restore your device from an iCloud or iTunes backup

You can also forward messages with this section of the following article:

Send messages with your iPhone, iPad, or iPod touch

 

How do I forward a message?

1. To forward a message, tap and hold the message bubble, then tap More.
   
2. Tap to select the message you want to forward, then tap  and select the person to send it to.
   

Thank you for using Apple Support Communities.

All the very best,

Sterling