Cursing Ali means Cursing Rasool

we Read in Majma' Al-Zawa'id, volume 9, hadith 14840, page 123:
١٤٧٤٠ - وَعَنْ أَبي عبد الله الجدلى، قَالَ : دَخَلْتُ عَلَى أَمْ سَلَمَةَ، فَقَالَتْ لِي:
أَيْسَبُ رَسُولَ اللَّهِ ﷺ فِيكُمْ؟ قُلْتُ : مَعَاذَ اللَّهِ، أَوْ سُبْحَانَ اللَّهِ، أَوْ كَلِمَةً نَحْوَهَا، قَالَتْ: سَمِعْتُ رَسُولِ اللهِ ﷺ يَقُولُ: مَنْ سَبَ عَلِيًّا، فَقَدْ سَبَّنِي (۱).
رواه أحمد، ورجاله رجال الصحيح، غير أبي عبد الله الخدلي، وهو ثقة.

Abu Abdullah Al-Jadali narrated:

I entered upon Umm Salama, and she said to me, "Is the Messenger of Allah ﷺ being cursed among you?"

I replied, "God forbid! Or 'Glory be to Allah,' or something similar."

She said, "I heard the Messenger of Allah ﷺ say: 'Whoever curses Ali has indeed cursed me.'"

Narrated by Ahmad, and its narrators are those of the authentic (Sahih) collections, except for Abu Abdullah Al-Jadali, who is trustworthy.

We Read in Al Mustadrak ala Sahihayn, Vol 3, Page 130:
٤٦١٥ / ٢١٣ - أخبرنا أحمد بن كامل القاضي ، ثنا محمد بن سعد العوفي، ثنا يحيى بن أبي بكير، ثنا إسرائيل، عن أبي إسحاق، عن أبي عبد الله الجدلي قال : دخلت على أم سلمة رضي الله عنها فقالت لي : أيسب رسول الله ﷺ فيكم فقلت معاذ الله أو سبحان الله أو كلمة نحوها فقالت : سمعت رسول الله ﷺ يقول : من سب علياً فقد سبني» .

Ahmad bin Kamil Al-Qadi narrated to us, saying: Muhammad bin Sa’d Al-Awfi narrated to us, Yahya bin Abi Bukayr narrated to us, Israel narrated to us, from Abu Ishaq, from Abu Abdullah Al-Jadali, who said:

I entered upon Umm Salama (may Allah be pleased with her), and she said to me, "Is the Messenger of Allah ﷺ being cursed among you?"

I replied, "God forbid! Or 'Glory be to Allah,' or something similar."

She said, "I heard the Messenger of Allah ﷺ say: 'Whoever curses Ali has indeed cursed me.'"

We Read in Musnad Ahmad Ibn Hanbal, volume 44, hadith 26748, page 328 - 329:
Yahya bin Abi Bukayr narrated to us, saying: Israel narrated to us, from Abu Ishaq, from Abu Abdullah Al-Jadali, who said:

I entered upon Umm Salama, and she said to me, "Is the Messenger of Allah ﷺ being cursed among you?"

I replied, "God forbid! Or 'Glory be to Allah,' or something similar."

She said, "I heard the Messenger of Allah ﷺ say: 'Whoever curses Ali has indeed cursed me.'”