Parashas Vayeilech · Passuk 31:23
And He charged Joshua son of Nun: Be strong and courageous, for you shall bring the Israelites into the land that I promised them on oath, and I will be with you.
Torah Temimah points to Sanhedrin 8a.
English: See Sanhedrin 8a (Sefaria) for the full sugya English; the Hebrew Core Text is the derasha TT points to on this passuk.
Derash on the verse (Bavli sugya) — not a formal named middah of the 13
The Gemara uses this passuk in a sugya. Named as one of R' Yishmael's 13 only when that move is explicit.
Hashem’s charge to Yehoshua repeats strength and courage at the Jordan: courage is commanded because the mission continues after Moshe under divine appointment.