You Do Need power plug adapter while traveling from Eritrea to Israel.

Here is Why You Need An Adapter

The outlet and plug type used in Israel are C and H and in Eritrea are C and L. This is how they look like.

Eritrea

In Eritrea, outlets of type C and L are in use.

Type C

Type L

Israel

In Israel, outlets of type C and H are in use.

Type C

Type H