ATND response

I dont know if i’m in right place.
I made a network with 3 Xbees pro s1.
The first one with Destination Adress of the second, The second sending messages to the third, and this third xbee sending the messages back to the First Xbee.
When i send the command ATND I receive the RSSI value of the last package received by each zigbee. (The second and third one).
The RSSI value from the second zigbee is about the package received by the first one.
The RSSI value of the third zigbee is about which message? Received by the first or second zigbee?