Is Sa`i before Tawaf Valid?

The Standing Committee for Academic Research and Issuing Fatwas said: 

“If someone perform Sa`i before offering Tawaf , he does not have to repeat his Sa`i , because of the report narrated by Abu Dawud with an authentic chain of narrators  going back to Usamah ibn Sharik who said: I went out with the Prophet (peace and blessings of Allah be upon him) for Hajj, and the people were coming to him, saying: O Messenger of Allah, I did Sa`i before Tawaf , or I did one thing sooner and another thing later, and he kept saying: “There is so sin, there is no sin, except for a man who vilified the honour of a Muslim man; he is a wrongdoer who has sinned and is doomed.”  

And Allah is the Source of strength. May Allah send blessings and peace upon our Prophet Muhammad and his family and companions.” (Shaykh `Abd Al-`Aziz ibn `Abdullah ibn Baz, Shaykh `Abd Ar-Razzaq `Afifi, Shaykh `Abdullah ibn Ghadyan, Shaykh `Abdullah ibn Qa`ud, Fatwa Al-Lajnah, 11/320) 

For more details, please see the following answers: 34695 , 109274 , 109286 , and 209165 .

And Allah knows best.