This is the definition and applies for a passing play. It was a run play.
The 'Safe Zone'
Defensive holding cannot be called within five yards of the line of scrimmage.
This "safe zone" allows defenders to make contact with offensive players.
Any infraction outside of this zone, however, results in a penalty.
Defensive holding typically occurs when defenders try to keep up with a receiver running downfield.
As they try to prevent wide open passes, defenders sometimes end up holding onto a receiver's jersey, arms, or shoulders.