“When they became oblivious to warnings, We showered them with everything they desired. But just as they became prideful of what they were given, We seized them by surprise, then they instantly fell into despair.”   (Q6:44)
Aside from the general meaning of the verse, another possible meaning according to Imam Muhammad al-Baqir (a) is 
When they became oblivious to warnings, 
that when the people neglected their duty of being loyal [to Imam Ali (a)] after they had been commanded to do so,