[If] he paid him the principal, but did not pay him the fifth; [if] he forgave him the principal, but did not forgive him the fifth; [or] if he forgave him for both —- save less than the worth of a perutah of the principal —- he need not pursue him.  [If] he paid him the fifth, but did not pay him the principal; [if] he forgave him the fifth, but did not forgive him the principal; [or it] he forgave him for both save the worth of a perutah of the principal —- he must pursue him.