It is common to have a number of messages that you want to combine and share them with others. Copy and paste allows you to forward message one by one and it is time consuming. Turns out there is a quick and simple way to combine messages and forward them at once in Messages for iOS.
Tap and hold the first message that you want to forward. Select More from the popup menu. This will select the first message and place you in a selection mode.
Tap on the checkmark button on the left to select the rest of the messages. Then tap on the arrow at right-bottom corner.
A New Message window will appear with the selected messages in the compose area. Complete the message, add recipients and tap Send to forward the message.