Siblings of more than one elements

Siblings of more than one elements

Hello!

I have a set of elements with id-s x1,x2,x3,x4. If i select only one of them siblings like $('#x1').siblings(), it selects the other three elements. But if i select siblings of two elements like $('#x1,#x2').siblings(), it selects all elements.

How can i select more than one elements siblings?

Thank you!