Hebrews 10 ► Peshitta Holy Bible Translated 16“This is the covenant that I shall give them after those days, says THE LORD JEHOVAH: I shall put my law into their minds, and I shall write it upon their hearts,

Romans 2 ►Peshitta Holy Bible Translated
13The hearers of The Written Law are not righteous ones before God, but the doers of The Written Law are justified. 14For if the Gentiles who have not The Written Law would perform those things of The Written Law by their nature, while they have not The Written Law, they would be The Written Law to themselves. 15And they show the work of The Written Law written on their heart and their conscience testifies to them, while their reasoning rebukes or defends each one, 16In the day when God judges the secrets of the children of men according to my Gospel, by Yeshua The Messiah.

The written law is every word that proceeds from the mouth of yahuah as the savior yahushuah hamashiach jesus the messiah said in matthew 4:4 But he answered and said, “It is written: 'A man does not live by bread only, but by every word that proceeds from the mouth of God.' “

Not just the first 10 instructions given, but every word that proceeds from the mouth of yahuah.

matthew 4 quotes Deuteronomy 6 and 8 and psalms and calls it written. These chapters also command wearing the teffilin and tizitziyot.