'Matter' in the Bible

As far as this matter, may Yahweh pardon your servant when my master goes [into] the house of Rimmon to worship there, and he [is] leaning himself on my arm, that I also bow down [in] the house of Rimmon: when I bow down [in] the house of Rimmon, may Yahweh please pardon your servant in this matter."

Then the heart of the king of Aram was stormy because of this matter, so he called his servants and said to them, "Can you not tell me {who among us sides with the king of Israel}?"