When the Prophet (Sallallahu Alaihi wa Sallam) saw a man eating with his left hand he said to him: "Eat with your right hand". The man said: 'I can't'. The Prophet (Sallallahu Alaihi wa Sallam) there upon said: "May you not be able". He refused (to eat with his right hand) out of arrogance only. He was not able to raise that hand again" .
The hadith is considered as authentic as it is in sahih Muslim and the person cursed here is known as Busr ibn Ra'iy al-'ir al-Ashja'iy بُسْر ابن راعي العير الأشجعي (also Bushr بشر was quoted) some scholars like ibn Manda ابن مندة, abu Nu'aym أبو نعيم and ibn Makula ابن ماكولا, call him a sahabi (so you may find him as Busr al-Ashja'ii بسر الأشجعي in Usd al-Ghabah أُسْد الغابة في معرفة الصحابة of the historian ibn al-Athyr) without quoting any hadith narrated on his authority, while others like al-Qadi 'Iyad said he is a munafiq (hypocrite).
The hadith was also compiled by ad-Darimi in his Sunan, Imam Ahmad in his Musnad, at-Tabarni in his Kabir and al-Bayhaqi in his as-Sunan al-Kubra. All of them with the same first 3 narrators of sahih Muslim until: ... From 'Ikrmiah ibn 'Ammar عِكْرِمَة بْنِ عَمَّار from Iyyas ibn Salamah al-Akwa' إِيَاس بْنُ سَلَمَةَ بْنِ الأَكْوَع from his father Salamah ibn 'Amr al-Akwa' سَلَمَة بن عمرو بن الأَكْوَع (who witnessed what happened).
It's an authentic hadith from Sahih Muslim.
It can be found here: https://sunnah.com/muslim/36/142