The Yahood's Trick on the Prophet Sallasalam

According to this report the yahood wanted to get rid of the process of being in madina and send him on some you know goose chase of an expedition so that he abandoned madina. The romans really it is not conceivable to imagine them sending 40 000 troops to battle the arabes because they didn't pose any threat to them right? There seems to be some whisperings in the sera of the validity of this for example when the prophet sallasallalam took a month off from his wives if you remember there was some marital disputes and  the prophet sallam cut off his wives for one month if you remember he lived in the messit we talk about the