Deuteronomy 11:8
Therefore shall ye keep all the commandments which I command you this day, that ye may be strong, and go in and possess the land, whither ye go to possess it;
Cross-reference
Deuteronomy 11:13 continues the same covenant context, linking obedience to blessings—reinforcing the condition for strength in verse 8.
Deuteronomy 8:11 warns against forgetting God after receiving blessings — the same danger that threatens those who fail to obey the command in Deuteronomy 11:8.
Deuteronomy 28:47 warns of curses for not serving God joyfully — the opposite outcome of the obedience commanded in Deuteronomy 11:8, which brings blessing.
Deuteronomy 31:23 commissions Joshua to be strong and lead Israel into the land — the very promise and command that Deuteronomy 11:8 sets as the goal of obedience.
Deuteronomy 8:10 describes the blessing of the land after obedience — the very reward promised to those who keep the commandments in Deuteronomy 11:8.
Deuteronomy 10:12-15 expands on what God requires — fear, love, and obedience — which is exactly the content of the commandment in Deuteronomy 11:8.
Deuteronomy 26:16-19 reaffirms the covenant relationship and the call to obedience for becoming God's holy people, paralleling the condition for possessing the land in Deuteronomy 11:8.
Deuteronomy 27:10 reinforces the command to obey God's statutes, the same condition for strength and possession of the land.
Joshua 1:6 directly echoes the call to be strong and take the land, fulfilling the promise connected to obedience in Deuteronomy 11:8.
Joshua 1:7 links strength to careful obedience of the law for success — exactly the same condition for entering the land as in Deuteronomy 11:8.