Behold, he withholdeth the waters, and they dry up (Isaiah 50)

Isaiah chapter 50 is a very short one with very few notes. I don't really know what to make of the talk of "your mother's divorcement"; perhaps the idea here is that God divorced Israel when he sent them into exile? The next bit is definitely about the exile, where God talks about the people of Israel selling themselves into slavery to pay for their sins. Perhaps the part in verse two about him coming to call and finding nobody home is about the people turning away from God, so nobody was looking for him to save them; he emphasizes that he was always able to save them, so it's strange they didn't call. The bit about drying up waters until there are nothing but stinking fish may be a judgment that happened to the land of Israel. God also talks about making the sky black, but I don't know what this would refer to (maybe an eclipse?). Isaiah talks about his own righteousness, and how God has blessed him with wisdom and bravery in the face of adversity. I believe there are some who take verse six as a prophecy of what happened to Jesus right before his crucifixion, but it's not clear, and I don't remember it being quoted in the New Testament.