18 Manasseh rested with his ancestors and was buried in his palace garden, the garden of Uzza. And Amon his son succeeded him as king.
References for 2 Kings 21:18

Amon King of Judah

19 Amon was twenty-two years old when he became king, and he reigned in Jerusalem two years. His mother’s name was Meshullemeth daughter of Haruz; she was from Jotbah.
References for 2 Kings 21:19
      20 He did evil in the eyes of the LORD, as his father Manasseh had done.
      References for 2 Kings 21:20
      21 He followed completely the ways of his father, worshiping the idols his father had worshiped, and bowing down to them.
      22 He forsook the LORD, the God of his ancestors, and did not walk in obedience to him.
      References for 2 Kings 21:22
      23 Amon’s officials conspired against him and assassinated the king in his palace.
      References for 2 Kings 21:23
      24 Then the people of the land killed all who had plotted against King Amon, and they made Josiah his son king in his place.
      References for 2 Kings 21:24
      25 As for the other events of Amon’s reign, and what he did, are they not written in the book of the annals of the kings of Judah?
      26 He was buried in his tomb in the garden of Uzza. And Josiah his son succeeded him as king.
      References for 2 Kings 21:26