Does Isaiah 58 tell us who God is talking to here? Why, yes it does.Prologue:
AV Ro 3:3-4 For what if some did not believe? shall their unbelief make the faith of God without effect? 4 God forbid: yea, let God be true, but every man a liar; as it is written, That thou mightest be justified in thy sayings, and mightest overcome when thou art judged.
AV Ja 4:11-12 Speak not evil one of another, brethren. He that speaketh evil of [his] brother, and judgeth his brother, speaketh evil of the law, and judgeth the law: but if thou judge the law, thou art not a doer of the law, but a judge. 12 There is one lawgiver, who is able to save and to destroy: who art thou that judgest another?
AV Isa 58:13 If thou turn away thy foot from the sabbath, [from] doing thy pleasure on my holy day; and call the sabbath a delight, the holy of the LORD, honourable; and shalt honour him, not doing thine own ways, nor finding thine own pleasure, nor speaking [thine own] words:
It's your testimony against GOD's.
Ask me, how I know who is lying then ???
Yours in Christ, Michael
"Cry loudly, do not hold back; Raise your voice like a trumpet, And declare to My people their transgression And to the house of Jacob their sins. Isaiah 58:1 NASB
Then you will take delight in the LORD, And I will make you ride on the heights of the earth; And I will feed you with the heritage of Jacob your father, For the mouth of the LORD has spoken." Isaiah 58:14 NASB
He is talking to the nation of Israel. The ones who He gave the Sabbath to as a sign of the covenant between Him and them that was given at Sinai.