Psalms 119:160 does have the following definition:
judgments מִשְׁפַּ֥ט (miš·paṭ) Noun - masculine singular construct Strong's 4941: A verdict, a sentence, formal decree, divine law,
penalty, justice, privilege, style
On the other hand, Psalms 119:97 has the following definition with respect to “law”:
Your law! תוֹרָתֶ֑ךָ (ṯō·w·rā·ṯe·ḵā) Noun - feminine singular construct | second person masculine singular Strong's 8451: Direction,
There are apparently different Hebrew words for “Law”:
It’s possible that he is wrong on the particular nuance of the Hebrew usage.
Your Jewish friend also should consider that God promised & prophesied a new covenant to the people of Israel:
“Behold, the days are coming, says the Lord, when I will make a new
covenant with the house of Israel and with the house of Judah—
not according to the covenant that I made with their fathers in the
day that I took them by the hand to lead them out of the land of
Egypt, My covenant which they broke, though I was a husband to them,
says the Lord.
But this is the covenant that I will make with the house of Israel
after those days, says the Lord: I will put My law in their minds, and
write it on their hearts; and I will be their God, and they shall be
No more shall every man teach his neighbor, and every man his brother,
saying, ‘Know the Lord,’ for they all shall know Me, from the least of
them to the greatest of them, says the Lord.
For I will forgive their iniquity, and their sin I will remember no
more.”” Jeremiah 31:31-34
Psalms 19:8 is more direct:
The precepts פִּקּ֘וּדֵ֤י (piq·qū·ḏê) Noun - masculine plural construct Strong's 6490: Appointed, a mandate
Since there is a New Covenant prophesied in the Old Testament, I would show your friend that such a new covenant requires a change in the Law, namely from animal sacrifices to the New Atonement found in Christ, since Jeremiah 31:34 makes it clear that God Himself will forgive their sins, this points towards the ultimate sacrifice of Jesus as our sin bearer.
“Previously saying, “Sacrifice and offering, burnt offerings, and
offerings for sin You did not desire, nor had pleasure in them” (which
are offered according to the law), then He said, “Behold, I have come
to do Your will, O God.” He takes away the first that He may establish
the second. By that will we have been sanctified through the offering
of the body of Jesus Christ once for all.” Hebrews 10:8-10
1.) God has taken away the first: burnt offerings for sin according the law.
So that God may do,
2.) Establish Christ as the sin offering in our place.
Hebrews 7 also talks about a change in law, which only God can do:
“Therefore, if perfection were through the Levitical priesthood (for
under it the people received the law), what further need was there
that another priest should rise according to the order of Melchizedek,
and not be called according to the order of Aaron? For the priesthood
being changed, of necessity there is also a change of the law.”
I think if your Jewish friend wants to assert “God’s Law is eternal” he should be using the Hebrew word: Huqqim or Piqqudim for “law” - seen in the chart above^.
An additional note, we also have:
דְּרָכָ֖יו də-rā-ḵāw His ways [are]
Sources: Did You Know There Are Different Hebrew Words For "Law"?
BibleHub's Hebrew words for Psalms 119:97
BibleHub's Hebrew words for Psalms 119:160
BibleHub's Hebrew words for Psalms 19:8
A helpful resource: The Epistle to the Hebrews [ECBC]
By: F.F. Bruce