Allah curses the one who curses his parents

Abu't-Tufayl said, "'Ali was asked, 'Did the Prophet ﷺ give you something special which he did not give to anyone else?' He replied, 'The Messenger of Allah ﷺ did not give me anything special which he did not give to everyone else except for what I have in my sword scabbard.' He brought out a piece of paper. Written on that paper was: 'Allah curses anyone who sacrifices an animal to something other than Allah. Allah curses anyone who steals a milestone. Allah curses anyone who curses his parents. Allah curses anyone who gives shelter to an innovator.'"

سُئِلَ عَلِيٌّ هَلْ خَصَّكُمُ النَّبِيُّ ﷺ بِشَيْءٍ لَمْ يَخُصَّ بِهِ النَّاسَ كَافَّةً؟ قَالَ مَا خَصَّنَا رَسُولُ اللهِ ﷺ بِشَيْءٍ لَمْ يَخُصَّ بِهِ النَّاسَ إِلاَّ مَا فِي قِرَابِ سَيْفِي ثُمَّ أَخْرَجَ صَحِيفَةً فَإِذَا فِيهَا مَكْتُوبٌ لَعَنَ اللَّهُ مَنْ ذَبَحَ لِغَيْرِ اللهِ لَعَنَ اللَّهُ مَنْ سَرَقَ مَنَارَ الأَرْضِ لَعَنَ اللَّهُ مَنْ لَعَنَ وَالِدَيْهِ لَعَنَ اللَّهُ مَنْ آوَى مُحْدِثًا