Ibn Ezra, on Isa 13:9

“Behold, the day of the Lord shall come, a cruel day, and full of indignation, and of wrath, and fury, to lay the land desolate, and to destroy the sinners thereof out of it.”

“אכזרי Cruel. The י is paragogic, as in ) not radical but formative; (b) not essential but superfluous. פנימי inner (1 Kings 6:27). The land, viz., of the Chaldæans.”

Imported from an open dataset — not yet checked against the printed edition.