The Google co-founder hit out at employees doing the bare minimum, calling them “not only unproductive but also highly demoralizing to everyone else.”

An internal memo read by The New York Times shows the Google CEO recommending in-office work “at least every weekday.”

A recent Google memo released by the tech company’s co-founder Sergey Brin asked the DeepMind AI division employees to spend at least 60 hours every week in the office. Brin added that the employees should also try to be present in the office all weekdays.