'Weakens' in the Bible

Therefore the princes (court officials) said to the king, “Please [we implore you] let this man [Jeremiah] be put to death; for [speaking] in this way he discourages and weakens [the will of] the soldiers who remain in this city and he discourages and weakens [the will of] all the people by speaking such words to them; for this man is not seeking the well-being of these people, but rather their harm.”

It is good [to do the right thing and] not eat meat or drink wine, or do anything that offends your brother and weakens him spiritually.