3 occurrences across the corpus

KJV Apocrypha (Eastern Orthodox Additions)

3 Maccabees 6:33

So the king also collected a number of guests for the occasion, and returned unceasing thanks with much magnificence for the unexpected deliverance afforded him.

1 Enoch

1 Enoch 24:3

Among these there was a tree of an unceasing smell; nor of those which were in Eden was there one of all the fragrant trees which smelt like this. Its leaf, its flower, and its bark never withered, and its fruit was beautiful.

OT Pseudepigrapha

The Letter of Aristeas 7:33

After pondering for a moment he replied, 'You could best establish its security if you were to imitate the unceasing benignity of God. For if you exhibit clemency and inflict mild punishments upon those who deserve them in accordance with their deserts, you will turn them from evil and lead them to repentance.' [*1]