'Flock' in the Bible

For I know this, that there will come in amongst you after my departure grievous wolves, not sparing the flock;

Who ever carries on war at his own charges? who plants a vineyard and does not eat of its fruit? or who herds a flock and does not eat of the milk of the flock?

shepherd the flock of God which is among you, exercising oversight, not by necessity, but willingly; not for base gain, but readily;

not as lording it over your possessions, but being models for the flock.