What do these verses mean? (From Psalm 132)

I was singing in a choir at [St. Patrick's Cathedral](https://www.cam.org.au/cathedral) in Melbourne, Australia. One of the lyrics was as follows: > God will give him the throne of David, his father. > The Lord swore an oath to David; He will not go back on his word: 'A son, the fruit of your body, Will I set upon your throne.' > For the Lord has chosen Zion; He has desired it for his dwelling: 'This is my resting place forever, Here have I chosen to live. > 'There David's stock will flower: I will prepare a lamp for my anointed. I will cover his enemies with shame, But on him my crown shall shine.' I felt bad for singing these lyrics without knowing what they meant, so my question is: **What do these verses mean?**