Missing Vav in  “Eliyahu”

Chapter 26, Verse 42

Then will I remember my covenant with Jacob, and also my covenant with Isaac, and also my covenant with Abraham will I remember; and I will remember the land.

Rashi

In five places* (only) the name יעקוב is written in full (i.e. with a Vav) in
scripture, and the name אליהו is written with the vav missing from his
name i.e. אליה also in five places ** in scripture.Jacob took the letter “vav”
from the name of אליהו the prophet as security-that he will come and
herald the redemption of his (Jacob’s) children, speedily in our days. The
five instances of the Vav symbolize the five fingers of the hand i.e. this
security arrangement between Jacob and Elijah was sealed with a
handshake.(GurAryeh)

*The five places are as follows:
Vayikra Ch. 26 v.42
Jeremiah Ch. 30 v.18
Jeremiah Ch. 33 v.26
Jeremiah Ch. 46 v.27
Jeremiah Ch. 59 v.19
**The five places are as follows:
2 Kings Ch.1 v. 3
2 Kings Ch.1 v. 4
2 Kings Ch.1 v. 8
2 Kings Ch.1 v. 12
2 Kings Ch.3 v. 27