Deuteronomy 18:4 "And the first of the fleece of your sheep (shearing), you shall give him"

It takes quite a while for a newborn lamb to grow and develop into a full grown sheep.

The owner tends gently and patiently to his flock until the time arrives for him to benefit from their wool.

Carefully, he does the shearing, thinking about the profit he will make from the wool.

This Positive Mitzvah makes him stop and think about others who do not tend to their own private livelihoods, but are committed to the service of HaShem.

The Torah commands us to give the first portion of the wool to the priests.