In Islam, Halal and Harram are not prone to change until Qiyamah.
وَ عَنْ إِسْمَاعِيلَ بْنِ جَابِرٍ عَنْ أَبِي عَبْدِ اللَّهِ ع أَنَّ اللَّهَ بَعَثَ مُحَمَّداً نَبِيّاً فَلَا نَبِيَّ بَعْدَهُ أَنْزَلَ عَلَيْهِ الْكِتَابَ فَخَتَمَ بِهِ الْكُتُبَ فَلَا كِتَابَ بَعْدَهُ
And from Ismail Bin Jabir,
‘From Abu Abdullah-asws: ‘Allah-azwj Sent Muhammad-saww as a Prophet-saww, and there will be no Prophet-saww after him-saww. Allah-azwj Revealed the Book unto him-saww and Ended the (previous) Books by it, so there is no Book after it.
أَحَلَّ فِيهِ حَلَالَهُ وَ حَرَّمَ فِيهِ حَرَامَهُ فَحَلَالُهُ حَلَالٌ إِلَى يَوْمِ الْقِيَامَةِ وَ حَرَامُهُ حَرَامٌ إِلَى يَوْمِ الْقِيَامَةِ فِيهِ نَبَأُ مَا قَبْلَكُمْ وَ خَبَرُ مَا بَعْدَكُمْ وَ فَصْلُ مَا بَيْنَكُمْ
He-azwj Permitted His-azwj Permissible(s) in it and Prohibited His-azwj Prohibitions in it. So, His-azwj Permissible(s) are Permissible up to the Day of Qiyaman, and His-azwj Prohibitions are Prohibited up to the Day of Qiyamah. In it are news of what was before you, and news of what is to be after you, and Decisions of what is between you all’.
ثُمَّ أَوْمَأَ بِيَدِهِ إِلَى صَدْرِهِ وَ قَالَ نَحْنُ نَعْلَمُهُ.
Then he-asws gestured by his-asws hand to his-asws own chest and said: ‘We-asws know it!’’[1]
كش، رجال الكشي مُحَمَّدُ بْنُ مَسْعُودٍ عَنْ عَلِيِّ بْنِ مُحَمَّدٍ عَنْ مُحَمَّدِ بْنِ أَحْمَدَ عَنْ أَبِي إِسْحَاقَ عَنْ عَلِيِّ بْنِ مَعْبَدٍ عَنْ هِشَامِ بْنِ الْحَكَمِ قَالَ: سَأَلْتُ أَبَا عَبْدِ اللَّهِ ع بِمِنًى عَنْ خَمْسِمِائَةِ حَرْفٍ مِنَ الْكَلَامِ فَأَقْبَلْتُ أَقُولُ يَقُولُونَ كَذَا وَ كَذَا
(The book) ‘Rijal’ of Al Kashy – Muhammad Bin Masoud, from Ali Bin Muhammad, from Muhammad Bin Ahmad, from Abu Is’haq, from ali Bin Ma’bad, from Hisham Bin Al Hakam who said,
‘I asked Abu Abdullah-asws at Mina about five hundred letters from the speech. I accepted saying, ‘They are saying such and such’.
قَالَ فَيَقُولُ لِي قُلْ كَذَا فَقُلْتُ هَذَا الْحَلَالُ وَ الْحَرَامُ وَ الْقُرْآنُ أَعْلَمُ أَنَّكَ صَاحِبُهُ وَ أَعْلَمُ النَّاسِ بِهِ فَهَذَا الْكَلَامُ مِنْ أَيْنَ
He (the narrator) said, ‘He-asws said to me: ‘Say such and such’. I said, ‘This Permissible and the Prohibition, and Quran, I know that you-asws are its master, and the most learned of the people with it. So this speech is from where?’
فَقَالَ يَحْتَجُّ اللَّهُ عَلَى خَلْقِهِ بِحُجَّةٍ- لَا يَكُونُ عِنْدَهُ كُلَّمَا يَحْتَاجُونَ إِلَيْهِ.
He-asws said: ‘Allah-azwj Argues upon His-azwj creatures with His-azwj Argument. There does not happen to be with him all what they are needy to’’.[2]
[1] Bihar Al Awaar – V 46, The book of History – Ja’far Al Sadiqasws, Ch 4 H 33 b
[2] Bihar Al Awaar – V 46, The book of History – Ja’far Al Sadiqasws, Ch 4 H 34