Verse Nu32-17 speaking about the deal Moses made
with Gad - to go in the front lines when fighting for Israel
in exchange for which Gad received the TransJordan as an
inheritance - states
but we [the Gaddites]
ourselves will be ready armed to go before the Jews, until we have brought them unto their place; and our little ones shall dwell in the fortified cities because of the inhabitants of the land.
Rashi explains why the Gaddites volunteered to
go in the front lines: The Gaddites were good fighters.
Good fighters are preferred in the front line because it is
the thick of battle. Hence the Gaddites volunteered to go on the
Rashi additionally supports
his comment using the reference method
citing a verse from Dt33-20,
which clarifies this volunteer to go in the front lines and
And of Gad he said, Blessed be he who enlarges Gad;
he lives as a lion, and tears the arm with the crown of the head.
In other words Gad volunteered to go in the front lines because
he is a good lion-like warrior.
Although an other verse is referenced here
we have classified this Rashi comment
as a NonVerse method. Indeed
the focus of Rashi's comment is an explanation of why
Gad volunteered to go in the front line. To answer this question
Rashi uses knowledge of the real world: The front line men in a
battle must be stronger because
the thicket of the battle is there.
This deduction is logical and does not involve references to
other verses. Hence we classify the Rashi as using
the Non Verse method.
By coincidence Rashi found a reference supporting
this logical connection; but his comment is still is in essence a logical
connection. Alternatively, we can simply say that Rashi did use
a reference but explained the support of this other
verse by using knowledge of the real world such as the reasons
for placing certain people on the front lines of a war.