This is sahih muslim book 6 hadith 21
Salim b. 'Abdullah (b. 'Umar) reported on the authority of his father that Allah's Messenger (ﷺ) observed the prayer of a traveller, i. e. two rak'ahs in Mina, and other places; so did Abu Bakr and 'Umar, and 'Uthman too observed two rak'ahs at the beginning of his caliphate, but he then completed four.
Reference : Sahih Muslim 694 a
In-book reference :
Book 6, Hadith 21
USC-MSA web (English) reference : Book 4, Hadith 1477
(deprecated numbering scheme)
This is Sahih Bukhari / Volume-8 / Book-73 / Hadith-137
Narrated Abu Huraira:
A man said to the Prophet (ﷺ), "Advise me! "The Prophet (ﷺ) said, "Do not become angry and furious." The man asked (the same) again and again, and the Prophet (ﷺ) said in each case, "Do not become angry and furious."
Sahih Muslim 8th book is relating to marriage and there is no such reference (please correct me if i am wrong)
Where in all these references there is any mention of nationalism?
"The Muslim Ummah is one at the exclusion of all others, their land is one, their war is one and their peace is one" can you mention reference for this?