Fascinating Pshat From The Malbim-Toras Hashem Temima

The Gemoro asks  who wrote the last eight Pesukim

in the Torah (Vayomos Shom Moshe-)

and  answers two Tirutzim.

The Zohar  has a third answer. "Moshe was Niftar

and Hashem brought him back

to life. Moshe wrote then the last eight Pesukim,

and died again."

The Malbim has a beautiful  pshat on the Pasuk 

“Toras Hashem Temima”-The Torah

is complete – “Meshivas Nofesh”- because Hashem

brought back the Nefesh of Moshe 

to complete the last eight Pesukim in the Torah