If the manager has been moaning about them?
On Tuesday my manager had a day off and left jobs for the teams to complete. On Wednesday she complained to myself and another member of staff that 3 members of the team (that we were not working with that day) had not completed the jobs and she would have to spend time doing it.
I saw on Tuesday the team members doing the job they were asked to do and they would have done it correctly as it is a job they do regularly so not a case of they don’t know what they are doing.
Would you tell a colleague that the manager accused them of not doing their job?