Tafsir of Al-Baqarah 2:139

Allah directed His Prophet to pre-empt the arguments with the idolators:

قل أتحاجوننا في الله

Say (O Muhammad to the Jews and Christians), "Dispute you with us about Allah, meaning, "Do you dispute with us regarding the Oneness of Allah, obedience and submission to Him and in avoiding His prohibitions!

وهو ربنا وربكم

while He is our Lord and your Lord, meaning, He has full control over us and you, and deserves the worship alone without partners.

ولنا أعمالنا ولكم أعمالكم

And we are to be rewarded for our deeds and you for your deeds. meaning, we disown you and what you worship, just as you disown us. Allah said in another Ayah,

وإن كذبوك فقل لى عملى ولكم عملكم أنتم برييون مما أعمل وأنا برء مما تعملون

And if they belie you, say: "For me are my deeds and for you are your deeds! You are innocent of what I do, and I am innocent of what you do!'' (10:41) and,

فٳن حاجوك فقل أسلمت وجهى لله ومن اتبعن

So if they dispute with you (Muhammad) say: "I have submitted myself to Allah (in Islam), and (so have) those who follow me.'' (3:20) Allah said about Ibrahim,

وحاجه قومه قال أتحاجونى فى الله

His people disputed with him. He said: "Do you dispute with me concerning Allah.'' (6:80) and,

ألم تر إلى الذى حاج إبرهيم فى ربه

Have you not looked at him who disputed with Ibrahim about his Lord (Allah). (2:258) He said in this honorable Ayah,

ولنا أعمالنا ولكم أعمالكم ونحن له مخلصون

And we are to be rewarded for our deeds and you for your deeds. And we are sincere to Him. meaning, "We disown you just as you disown us,''

ونحن له مخلصون

And we are sincere to Him, in worship and submission