New Revised Standard Version
Then you will prosper if you are careful to observe the statutes and the ordinances that the LORD commanded Moses for Israel. Be strong and of good courage. Do not be afraid or dismayed.

Contemporary English Version
If you obey the laws and teachings that the LORD gave Moses, you will be successful. Be strong and brave and don't get discouraged or be afraid of anything.

New American Bible
Only then shall you succeed, if you are careful to observe the statutes and ordinances which the LORD commanded Moses for Israel. Be strong and steadfast; do not fear or be dismayed.

Douay-Rheims Bible
For then thou shalt be able to prosper, if thou keep the commandments, and judgments, which the Lord commanded Moses to teach Israel: take courage and act manfully, fear not, nor be dismayed.

For then thou shalt be able to prosper, if thou keep the commandments, and judgments, which the Lord commanded Moses to teach Israel: take courage and act manfully, fear not, nor be dismayed.

Then shalt

1 Chronicles 28:7 And I will establish his kingdom for ever, it he continue to keep my commandments, and my judgments, as at this day.

Joshua 1:7,8 Take courage therefore, and be very valiant: that thou mayst observe and do all the law, which Moses my servant hath commanded thee: turn not from it to the right hand or to the left, that thou mayst understand all things which thou dost. . . .

1 Kings 2:3 And keep the charge of the Lord thy God, to walk in his ways, and observe his ceremonies, and his precepts, and judgments, and testimonies, as it is written in the law of Moses: that thou mayst understand all thou dost, and whithersoever thou shalt turn thyself:

2 Chronicles 20:20 And they rose early in the morning, and went out through the desert of Thecua: and as they were marching, Josaphat standing in the midst of them, said: Hear me, ye men of Juda, and all the inhabitants of Jerusalem: believe in the Lord your God, and you shall be secure: believe his prophets, and all things shall succeed well.

Psalm 119:6 Then shall I not be confounded, when I shall look into all thy commandments.

Jeremiah 22:3,4 Thus saith the Lord: Execute judgment and justice, and deliver him that is oppressed out of the hand of the oppressor: and afflict not the stranger, the fatherless, and the widow, nor oppress them unjustly: and shed not innocent blood in this place. . . .

to fulfil

Matthew 3:15 And Jesus answering, said to him: Suffer it to be so now. For so it becometh us to fulfil all justice. Then he suffered him.

Acts 13:22 And when he had removed him, he raised them up David to be king: to whom giving testimony, he said: I have found David, the son of Jesse, a man according to my own heart, who shall do all my wills.

Galatians 6:2 Bear ye one another's burdens: and so you shall fulfil the law of Christ.

James 2:8 If then you fulfil the royal law, according to the scriptures: Thou shalt love thy neighbour as thyself; you do well.

be strong

1 Chronicles 28:10,20 Now therefore seeing the Lord hath chosen thee to build the house of the sanctuary, take courage, and do it. . . .

Deuteronomy 31:7,8 And Moses called Josue, and said to him before all Israel: Take courage, and be valiant: for thou shalt bring this people into the land which the Lord swore he would give to their fathers, and thou shalt divide it by lot. . . .

Joshua 1:6-9,18 Take courage, and be strong: for thou shalt divide by lot to this people the land for which I swore to their fathers, that I would deliver it to them. . . .

1 Corinthians 16:13 Watch ye: stand fast in the faith: do manfully and be strengthened.

Ephesians 6:10 Finally, brethren, be strengthened in the Lord and in the might of his power.

2 Timothy 2:1 Thou therefore, my son, be strong in Christ Jesus: