At the age of 25 years the Holy Prophet (Peace be upon him) went in to a business trip to which country?

At the age of 25 years the Holy Prophet (Peace be upon him) went in to a business trip to which country?

سال کی عمر میں حضور صلی اللہ علیہ وسلم کس ملک کے تجارتی دورے پر گئے؟ پچیس
Explanation

The Prophet's first business trip was to Syria at age 12 with his uncle Abu Talib (RA).

    During this journey, he met a monk named Bahira in Basra, Syria. 

    Shab-e-Miraj refers to a separate miraculous night journey of Prophet Muhammad (PBUH