Deuteronomy 27:25

“Keep far from a false charge, and do not kill the innocent or the righteous, for I will not justify the guilty.

‘You shall not go about as a slanderer among your people, and you shall not stand against the life of your neighbor; I am Yahweh.

so that the violence done to the seventy sons of Jerubbaal might come, and their blood might be laid on Abimelech their brother, who killed them, and on the lords of Shechem, who strengthened his hands to kill his brothers.

“In you they have taken bribes for the purpose of shedding blood; you have taken interest and profits, and you have injured your neighbors for gain by oppression, and you have forgotten Me,” declares Lord Yahweh.

“Indeed all Israel has trespassed against Your law, even turning aside, not listening to Your voice; so the curse has been poured out on us, along with the oath which is written in the law of Moses the servant of God, for we have sinned against Him.

Otherwise if you bless in the spirit only, how will the one who fills the place of the uninformed say the “Amen” at your giving of thanks, since he does not know what you are saying?