After Muhammad
There are contradictory reports about what happened to Bilal after the death of Muhammad in 632. What seems clear is that at some point Bilal accompanied the Muslim armies to Syria.
After the death of Muhammed, Usama ibn Zayd continued a military expedition to Syria, as commanded by Muhammad. However, it is very uncertain if that is the army Bilal accompanied.
Read more about this topic: Bilal Ibn Rabah Al-Habashi