Nehemiah 13:3

Israel Separates Itself

² because they did not meet the Israelites with bread and water, but hired Balaam against them to curse them. Yet our God turned the curse into a blessing. ³ When the Jews heard the law, they separated from Israel all who were of foreign descent. ⁴ Now prior to this, Eliashib the priest, who was appointed over the chambers of the house of our God, and was related to Tobiah [our adversary],

Israel

Nehemiah 9:2

The descendants of Israel (Jacob) separated themselves from all foreigners, and stood and confessed their sins and the wrongdoings of their fathers.

Exodus 12:38

A mixed multitude [of non-Israelites from foreign nations] also went with them, along with both flocks and herds, a very large number of livestock.

Numbers 11:4

The rabble among them [who followed Israel from Egypt] had greedy desires [for familiar and delicious food], and the Israelites wept again and said, “Who will give us meat to eat?

Nehemiah 10:28

Now the rest of the people—the priests, the Levites, the gatekeepers, the singers, the temple servants, and all those who had separated themselves from the peoples of the lands to the Law of God, their wives, their sons, their daughters, all those who had knowledge and understanding—

Ezra 10:11

So now, make confession to the Lord God of your fathers and do His will. Separate yourselves from the peoples of the land and from [your] foreign wives.”

Psalm 19:7-11

The law of the Lord is perfect (flawless), restoring and refreshing the soul;
The statutes of the Lord are reliable and trustworthy, making wise the simple.

Psalm 119:9

Beth.
How can a young man keep his way pure?
By keeping watch [on himself] according to Your word [conforming his life to Your precepts].

Psalm 119:11

Your word I have treasured and stored in my heart,
That I may not sin against You.

Proverbs 6:23

For the commandment is a lamp, and the teaching [of the law] is light,
And reproofs (rebukes) for discipline are the way of life,

Romans 3:20

For no person will be justified [freed of guilt and declared righteous] in His sight by [trying to do] the works of the Law. For through the Law we become conscious of sin [and the recognition of sin directs us toward repentance, but provides no remedy for sin].

James 1:27

Pure and unblemished religion [as it is expressed in outward acts] in the sight of our God and Father is this: to visit and look after the fatherless and the widows in their distress, and to keep oneself uncontaminated by the [secular] world.