Charles Spurgeon Commentary 2 Chronicles 33:11

"Wherefore Jehovah brought upon them the captains of the host of the king of Assyria, who took Manasseh in chains, and bound him with fetters, and carried him to Babylon." — 2 Chronicles 33:11 (ASV)

Therefore—

Since words were not sufficient, and God intended to save him, he came to blows: "Therefore"—

The LORD brought upon them the captains of the host of the king of Assyria, which took Manasseh among the thorns, and bound him with fetters, and carried him to Babylon.

They very likely chastened him with thorns, for the kings of Babylon were very cruel; and it may be that, when his back was lacerated by thorny scourges, he was put in prison with heavy fetters upon him.