Deuteronomy 32:30 is frequently cited in prayer devotionals, stating that one can chase a thousand and two can put ten thousand to flight, but this is dangerously inaccurate when read in context because of the revealed expectation of understanding the context and the revealed expectation of obedience to the law. There are two cites. Let's look at them together.
Moses finished writing the law and instructed the leaders:
 Gather the people together, men and women and little ones,
and the stranger who is within your gates,
that they may hear and that they may learn to fear the Lord your God
and carefully observe all the words of this law,
and that their children, who have not known it, may hear and learn
to fear the Lord your God as long as you live in the land...
Deuteronomy 31:12-13 NKJV
Then just before Moses was to die, God told him to teach one final song to the people, a song recounting how God gathered and protected them, carrying them as on eagle’s wings, richly meeting every need. But as they prospered, He warned that they would reject Him to worship objects made by human hands. They would become a nation without understanding, a reflection of America, therefore, they would face defeat before their enemies:

 How could one chase a thousand, and two put ten thousand to flight,
unless their Rock had sold them, and the Lord had surrendered them?
Deuteronomy 32:30 NKJV
Moses concluded this song with, 
Set your hearts on all the words which I testify among you today,
which you shall command your children to be careful to observe –
all the words of this law.
For it is not a futile thing for you, because it is your life,
and by this word you shall prolong your days...
(vv. 46-47)
The appropriate use for a prayer devotional or message is given in Leviticus 26, but there are specific requirements to receive this blessing. In your mind, circle the words "if" and "then."
You shall not make idols for yourselves;
neither a carved image nor a sacred pillar shall you rear up for yourselves;
nor shall you set up an engraved stone in your land, to bow down to it;
for I am the Lord your God.
You shall keep My Sabbaths and reverence My sanctuary:
I am the Lord.
If you walk in My statutes and keep My commandments,
and perform them,
then I will give you rain in its season, the land shall yield its produce,
and the trees of the field shall yield their fruit.
Your threshing shall last till the time of vintage,
and the vintage shall last till the time of sowing;
you shall eat your bread to the full, and dwell in your land safely.
I will give peace in the land, and you shall lie down,
and none will make you afraid;
I will rid the land of evil beasts,
and the sword will not go through your land.
You will chase your enemies,
and they shall fall by the sword before you.
Five of you shall chase a hundred,
and a hundred of you shall put ten thousand to flight;
your enemies shall fall by the sword before you.
For I will look on you favorably and make you fruitful,
multiply you and confirm My covenant with you.
You shall eat the old harvest, and clear out the old because of the new.
I will set My tabernacle among you, and My soul shall not abhor you.
I will walk among you and be your God,
and you shall be My people.
I am the Lord your God, who brought you out of the land of Egypt,
that you should not be their slaves;
I have broken the bands of your yoke and made you walk upright.
But if you do not obey Me,
and do not observe all these commandments…
(Leviticus 26:1-14 NKJV)
Then follows a chilling picture of what a nation looks like when it rejects God’s Commands to love and respect Him and one another, as it naturally falls into a downward spiral where people literally destroy and devour themselves and one another as we see throughout history and quickly emerging within America and the world today.
Many dismiss material from the Old Testament, stating it’s no longer relevant – today we have the New Covenant. So, let’s go to Paul’s letter to Timothy in the New Testament,
Be diligent to present yourself approved to God,
a worker who does not need to be ashamed,
rightly dividing the word of truth…
...from childhood you have known the Holy Scriptures,
which are able to make you wise for salvation
through faith which is in
Christ Jesus.
All Scripture is given by inspiration of God,
and is profitable for doctrine, for reproof, for correction,
for instruction in righteousness, that the man of God may be complete,
thoroughly equipped for every good work.
2 Timothy 2:15, 3:15–17 NKJV
And in his first letter to Timothy, Paul wrote,
Until I come, devote yourself to the public reading of Scripture,
to preaching and to teaching.
Do not neglect your gift…
1 Timothy 4:13-14 NIV
The New Testament had not yet been written, collected, and embraced. In fact, when Jesus defeated the devil at His temptation, three times he quoted Scripture from Deuteronomy, which is where our initial warning here is taken. And the New Testament cites the Old Testament over 250 times. In Matthew 4:4 Jesus reminded satan that man cannot live by bread alone but by every word that proceeds from the mouth of God (Deut. 8:3). Since He had not even chosen His disciples, clearly He was referring to the Old Testament.
Please, don’t take my word for it. This is a great topical Bible study. Grab a few colored pens and take this great adventure with God.
The secret of the Lord is for those who fear Him,
and He will make them know His covenant.
Psalm 25:14 NAS
Call to me and I will answer you and tell you
great and unsearchable things you do not know.
Jeremiah 33:3 NIV