The Red Devils boss oversaw a dramatic pre-match media conference ahead of United’s trip to Stoke City on Tuesday afternoon at the club’s Carrington training ground.
Van Gaal demanded an apology from the assembled media after recent speculation surrounding his long-term future at Old Trafford before he cut short his media duties in an abrupt fashion.
Former Juventus midfielder Davids played under Van Gaal during the manager’s spell in charge of Eredivisie side Ajax and the Netherlands national team.
So presumably his Instagram post was good-natured banter as he quoted Van Gaal’s final words from Tuesday’s media conference in his Instagram post on Christmas Day.
United are in fifth place and nine points behind surprise Premier League leaders Leicester City.
The Red Devils are winless in their last six games in all competitions which has prompted speculation linking Jose Mourinho with Van Gaal’s position.
MORE: Man United latest news
MORE: Arsenal latest news
MORE: Chelsea latest news
MORE: Liverpool latest news