'Matter' in the Bible

and those who die by the plague are fourteen thousand and seven hundred, apart from those who die for the matter of Korah;

for they are adversaries to you with their frauds, with which they have acted fraudulently to you, concerning the matter of Peor, and concerning the matter of Cozbi, daughter of a prince of Midian, their sister, who is smitten in the day of the plague for the matter of Peor.'

lo, they -- they have been to the sons of Israel, through the word of Balaam, to cause a trespass against Jehovah in the matter of Peor, and the plague is in the company of Jehovah.