How to create a single purchase order from different sales orders


I have multiple sales orders which contains items from a single supplier. How can I generate a single purchase order from multiple sales orders and I need all those sales orders to show the connection to the generated purchase order?

Any help is highly appreciated.

Create material request against sales order first. Then you can call multiple material request in one purchase order. Sales order will show the material request and purchase order in connection. Also you will be able to see the sales orders against which the PO is not created. Hope this helps