49 Or “For.” The Hebrew particle (כִּי, ki) here introduces the evidence that they had no respect for him.
50 Heb “you broke your yoke … tore off your yoke ropes.” The metaphor is that of a recalcitrant ox or heifer which has broken free from its master.
51 The of this verse has two examples of the old second feminine singular perfect, שָׁבַרְתִּי (shavarti) and נִתַּקְתִּי (nittaqti), which the Masoretes mistook for first singulars leading to the proposal to read אֶעֱבוֹר (’e’evor, “I will not transgress”) for אֶעֱבֹד (’e’evod, “I will not serve”). The latter understanding of the forms is accepted in but rejected by almost all modern English versions as being less appropriate to the context than the reading accepted in the translation given here.
52 Heb “you sprawled as a prostitute on.…” The translation reflects the meaning of the metaphor.

In other versions

ESVEnglish Standard Version

“For long ago I broke your yoke

and burst your bonds;

but you said, ‘I will not serve.’

Yes, on every high hill

and under every green tree

you bowed down like a whore.

NIVNew International Version (2011)

“Long ago you broke off your yoke

and tore off your bonds;

you said, ‘I will not serve you!’

Indeed, on every high hill

and under every spreading tree

you lay down as a prostitute.

CSBChristian Standard Bible

For long ago I broke your yoke;

I tore off your chains.

You insisted, “I will not serve!”

On every high hill

and under every green tree

you lay down like a prostitute.

NLTNew Living Translation

“Long ago I broke the yoke that oppressed you

and tore away the chains of your slavery,

but still you said,

‘I will not serve you.’

On every hill and under every green tree,

you have prostituted yourselves by bowing down to idols.

LEBThe Lexham English Bible

“For from long ago you have broken your yoke,

you tore to pieces your bonds.

And you said, ‘I will not serve!’

But on every high hill and under every leafy tree

you were lying down as a prostitute.

KJV 1900King James Version

For of old time I have broken thy yoke, and burst thy bands; and thou saidst, I will not transgress; when upon every high hill and under every green tree thou wanderest, playing the harlot.

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