Deuteronomy 31:3 earlier states that Joshua will lead the people over the Jordan, which Moses here commissions him to do.

In Deuteronomy 31:7, Moses commissions Joshua with the same charge 'be strong and courageous' — here God personally repeats it.

In Deuteronomy 31:14, God instructs Moses to bring Joshua for commissioning; here God directly commissions Joshua.

In Deuteronomy 31:6, Moses tells all Israel 'be strong and courageous'—the same charge he gives Joshua here, with the same promise of God's presence.

Deuteronomy 3:28 records God commanding Moses to charge and strengthen Joshua, which Moses is now doing in commissioning him.

Deuteronomy 1:38, Moses recounts God's command to encourage Joshua, which he is now enacting.

In Joshua 1:5-9, God personally repeats Moses' charge to Joshua, reinforcing the promise of His presence and the call to be strong.

Numbers 27:18 records God telling Moses to commission Joshua, which is exactly what Moses does in this verse.

In Joshua 1:1, after Moses' death, the LORD repeats the 'be strong and courageous' charge to Joshua—continuing and fulfilling Moses' commission.

In 2 Chronicles 32:7, Hezekiah uses 'Be strong and courageous' to encourage his people against Assyria—echoing Moses' charge.

In Haggai 2:4, God commands Zerubbabel and Joshua to 'be strong' with 'I am with you'—directly echoing Moses' charge.

In 1 Kings 2:1, David similarly charges Solomon with 'Be strong' as he nears death—a parallel succession commission.

In 1 Chronicles 22:6, David charges Solomon to build the temple—a similar transfer of leadership but with a different task.