Minimum time between two values Xbee

I have to send 64 bytes to xbee pro S2B
What should be the minimum time delay should be added between two bytes.

Can I send all 64 bytes at once at 9600bps.
& then send xbee to sleep

I am interfacing it with MSP430

Send the data as one data stream No breaks between the bytes and you should be fine. As for the time after sending the bytes to toggling the radio to sleep, I would recommend 20ms.