وَأَنذِرْ بِهِ ٱلَّذِينَ يَخَافُونَ أَن يُحْشَرُوٓا۟ إِلَىٰ رَبِّهِمْ ۙ لَيْسَ لَهُم مِّن دُونِهِۦ وَلِىٌّ وَلَا شَفِيعٌ لَّعَلَّهُمْ يَتَّقُونَ Qur’an Al-An'am (6:51)Waan th ir bihi alla th eena yakh a foona an yu h sharoo il a rabbihim laysa lahum min doonihi waliyyun wal a shafeeAAun laAAallahum yattaqoon a
It is obvious from the context that this verse refers to followers of earlier scriptures - such as the Jews and the Christians - who share with the followers of the Qur'an the belief in life after death (Zamakhshari), as well as to agnostics who, without having definite beliefs on this point, admit the possibility of life after death.
There are some men - sinners - who yet believe in Judgement; let them be warned of their personal responsibility to guard against evil; let them not rely upon protectors or intercessors before God; their sins can only be forgiven by God's own Mercy.