From Longman Dictionary of Contemporary Englishlabour the pointlabour the pointEMPHASIZEto describe or explain something in too much detail or when people have already understood it → labour
Examples from the Corpus
labour the point• United were too liberal with their marking and Lee Clark laboured the point. 7 minutes later, they took overall control.• I understand what you're saying -- there's no need to labour the point.• Enough has been said, and there is no need to labour the point. 