Holding Off The Islamic Invasion For 10 Years?

How would it be possible to hold off the Islamic invasions of the 7th century for around 10 years, but for them to invade 10 years later?

How would the Byzantines, Sassanids, North Africa, the Caucuses, Iberia and the Aegan Islands be affected?
 
Probably a stalemate during the Ridda Wars that occurred immediately after the death of Muhammad when several others claimed Prophethood or reigned on their Muslim commitments or just rebelled. For that Khalid must die.
 
Probably a stalemate during the Ridda Wars that occurred immediately after the death of Muhammad when several others claimed Prophethood or reigned on their Muslim commitments or just rebelled. For that Khalid must die.

Ok then, how would the Arabic invasion proceed in that event, against the weak, but probably powerful Sassanids and Byzantines?
 
Well, there was already even OTL a degree of cooperation between Heraclius and Yazdegerd and so it really depends if the situation for Yazdegerd has become better or worse. As by his time the Sassanid state was slipping toward fragmentation.
 
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