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

Here is Why You Need An Adapter

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

Somaliland

In Somaliland, outlets of type G are in use.

Type G

Israel

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

Type C

Type H