# In the twenty-third year of Joash son of Ahaziah king of Judah
"After Joash had been ruling Judah for almost 23 years". This is the last chapter about Elisha. The king of Israel is upset when Elisha is dying. Elisha assures him that he will have three victories over Aram.
# reign over Israel in Samaria
"rule over the kingdom of Israel located in Samaria"
# he reigned seventeen years
"Jehoahaz was king for 17 years"