Can't find source

לז"נ הקדוש ר' אברהם אשי בן הרב שמואל הי"ד
נעקד"ה ע"י הנאצים ימ"ש  ט"ו טבת

ישראל

In many Siddurim, at the end or Shemone Esrai, it says

"The Shlah Hakadosh writes, So as not to forget

your name after 120, to say a Pasuk that starts and ends

with the same letters as your own name starts

and end”. "

As far as we know, this Shlah does not exist.

Some claim* it is in the Kitzur Shlah (R.Y.M.Epstien) .

Those who checked couldn't find it there.

The Maharsham (Da’as Torah O.Ch. 156) claims, the source

is a Rashi (Micha 6:9) “whoever says this Pasuk will be

saved from Gehinom.”

This Shtikel is not really from Rashi but is in brackets

and was added on to Rashi.

The actual Mokor for this Minhag is, the Eliya Rabba (O.Ch.122)

He quotes in the name of the Bais Yosef, “Tov Lomar” It’s a

good thing to say etc. The B.Y. doesn’t mention any reward

for saying it. ( no mention of remembering your name after 120)

*The  original Artscroll Siddurim had the

Kitzur  Shlah as the source. They changed

it to the Eliya Rabba.