Under the Law of Moses the Israelites were required to worship God by offering animal sacrifices. There were several different kinds of sacrifices required but one thing they all had in common was that the animals had to be free of any defects. In the time of the prophet Malachi many of the people were dishonoring God by offering imperfect animals.
“A son honors his father, and a servant his master. If then I am a father, where is my honor? And if I am a master, where is my fear?” says the LORD of hosts to you, O priests, who despise my name.
But you say, “How have we despised your name?” By offering polluted food upon my altar.
But you say, “How have we polluted you?” By saying that the LORD’s table may be despised. When you offer blind animals in sacrifice, is that not evil? And when you offer those that are lame or sick, is that not evil?