What the verse actually pairs restraint with

Here is the verse that gets quoted at angry people, and the one that sits alongside it.

Read 3:134 to the end rather than stopping at the first clause. It does not say restrain and then nothing. It puts restraining together with pardoning people and with doing good, as one sequence, and the people it is describing are people who spend, in ease and in hardship. That is a description of somebody doing things, not of somebody standing there saying nothing.

The verb is kazama, to hold or to swallow down. Whether holding it entails silence in a given situation is a question for a scholar and there is a real discussion behind it. What the verse plainly does not do is stop at the holding.