(صحيح) … [ابن أبي الدنيا في ذم الغضب ابن عساكر] عن رجل من الصحابة)
It is reported that the Messenger of Allah (peace and blessings of Allaah be upon him) said:
This hadith was narrated by Ahmad (5/408), Ibn Abi ad-Dunya in Zammul-gadab, Ibn ‘Asakir “Tarikh Dimashq” from the words of one of the Companions  of the Prophet (peace and blessings of Allah be upon him).
Sheikh al-Albani called the hadith authentic. See Sahih al-Jami ‘as-sagyir (143), al-Silsilah al-sahiha (884).
These words of the Messenger of Allah (peace and blessings of Allaah be upon him) were addressed to one person who asked him to tell him about something that could benefit him in life.
It is reported that a follower of the Companions of ‘Ata, may Allah have mercy on him, said: “Indeed, in anger a person can say such a word, because of which he will destroy the good deeds of sixty or seventy years.” Ibn Rajab in Fathul Bari (1/200).
 Hafiz Ibn Hajar said: “The unknown name of the companion does not harm the hadith, since they are all worthy of trust.” See “Fathul-Bari” (10/24), “at-Taglik at-ta’lik” (5/21).