Nowhere In The Hebrew Bible (Old Testament) G-d Ever Said You May No Longer Obey His Commandments

Not yesterday. Neither today. Nor tomorrow.

Now, where does the teachings of the Greek book – New Testament came from?

From the Gospel to Revelation, if it does not false hope what do you call it?

Cf. Tehillim (Psalm 89:35; 34 in CB)

“Hezekiah’s Illness And Recovery”

In those days Hezekiah became deathly ill. Isaiah son of Amoz, the prophet, came to him, and he said to him, “Thus said Hashem: Instruct your household, for you shall die; and you shall not live.”
38:1
He said, “Please, Hashem, remember now that I have always walked before You faithfully and wholeheartedly, and I have done what is good in your eyes. “And Hezekiah wept an intense weeping.
38:3
The word of Hashem then came to Isaiah, saying, “Go and tell Hezekiah: Thus said Hashem, the God of David, your forefather: I have heard your prayer; I have seen your tears. Behold, I am going to add fifteen years to your days.
:4-5
And I will also rescue you and this city from the grip of the king of Assyria, and I will protect this city.
:6
… ‘My Lord, snatch away my [illness], be my guarantor.’
:14
What can I say? He said to me [that He would heal me] and He did! I will give up all my sleep [to praise Him for removing] the bitterness of my soul!
:15
My Lord, about them [You said], ‘They shall live’, and therein is the life of my spirit, may You heal me and cure me.
:16
Behold, [despite] peace, my bitterness intensified. But You desired that my soul not waste away in the netherworld, for You have cast all my sins behind Yourself.
:17
For the grave cannot thank You nor can death laud You; those who descend to the pit cannot hope for Your truth.
:18
A living person, a living person, he shall thank you, as I do today! A father can make Your truth known to children.
:19

1 In those days Hezekiah became critically ill, when Isaiah the son of Amoz, the prophet, came to him and said to him, “So has the Lord said, ‘Give orders to your household, for you are going to die and you shall not live.
2 “And Hezekiah turned his face to the wall, and he prayed to the Lord.
3 And he said, “Please, O Lord, remember now, how I walked before You truly and wholeheartedly, and I did what is good in Your eyes.” And Hezekiah wept profusely.
4 And the word of the Lord came to Isaiah, saying,
5 “Go and say to Hezekiah, ‘So has the Lord God of your father David said, “I have heard your prayer; I have seen your tears. Behold I will add fifteen years to your life.
6 And from the hand of the king of Assyria will I save you and this city, and I will protect this city.”
7 And this is your sign from the Lord, that the Lord will fulfill this word that He spoke.
8 Behold I return the shade of the steps that it went down on the steps of Ahaz by the sun backwards ten steps, and the sun returned ten steps on the steps that it had descended.
9 The writing of Hezekiah, king of Judah, when he became ill and recovered from his illness.
10 I said, “In the desolation of my days will I go into the gates of the grave; I am deprived of the rest of my years.”
11 I said, “I will not see the Eternal; the Eternal is in the land of the living; I will no longer look upon man, [but I will be] with those who dwell in withdrawal.
12 My generation was removed and exiled from me like a shepherd’s tent; I severed, like a weaver, my life; from glory He shall deprive me; from day and night You shall finish me.
13 I made [myself] until morning like a lion, so it would break my bones; from day and night You shall finish me.
14 Like a crane [and] a swallow, so I chatter; I moaned like a dove. My eyes were lifted on high. O Lord! Rob me! Pledge Yourself to me!
15 What shall I speak? He said to me, and He fulfilled it. I will cause all my sleep to flee because of the bitterness of my soul.
16 O Lord! Concerning them, [You said] they shall live, and before all of them the life of my spirit, and You cured me and gave me life.
17 Behold for peace, it is bitter for me, yea it is bitter, and You desired my soul from the grave of decay, for You have cast behind You all my sins.
18 For the grave shall not thank You, nor shall death praise You; those who descend into the pit shall not hope for Your truth.
19 The living, the living, he shall thank You, like me today; a father shall inform his children of Your truth.
20 The Lord [has promised] to save me, and we will play my hymns all the days of our life in the house of the Lord.”
21 And Isaiah said, “Let them take a cake of pressed figs and lay it for a plaster on the boil, and it will heal.”
22 And Hezekiah said, “What a sign that I will go up to the house of the Lord!”