In Deuteronomy 4:1-3, Moses commands Israel to listen and do the statutes — the same call to obedience as here.

Deuteronomy 11:32 commands careful obedience to all statutes — identical in theme to this charge to keep the whole commandment.

Deuteronomy 26:16 commands doing the statutes with all heart — the immediate context for this reiteration to keep the whole commandment.

Deuteronomy 28:1 immediately follows with the conditional blessing for obeying the very commandment just given.

James 2:10 reinforces that failing in one point breaks the whole law—directly relating to the command to keep all commandments.

Joshua 8:30 records building an altar on Mount Ebal, fulfilling the specific instructions following the command in Deuteronomy 27.

Luke 11:28 pronounces blessing on those who hear and keep God's word — the same principle of obedience commanded here.

John 15:14 defines friendship with Jesus by doing his commands — echoing the call to keep the whole commandment here.