Was Isaiah sawed in half?

[TonyChanYT]

Yes, according to a pseudepigraphical book, Ascension of Isaiah 11:

41 Because of these visions and prophecies Sammael Satan sawed Isaiah the son of Amoz, the prophet, in half by the hand of Manasseh.

Wiki:

Elements of the Ascension of Isaiah are paralleled in other Jewish and Christian writings. The method of Isaiah's death (sawn in half by Manasseh) is agreed upon by both the Babylonian Talmud and Jerusalem Talmud and is probably alluded to by the writer of the Epistle to the Hebrews (11:37).

Hebrews 11:

37a They were put to death by stoning; they were sawed in two; they were killed by the sword.