Reference: Siyar A’laam an-Nubalaa v20 p66
said:
When I decided to undertake a journey, I visited our Shaykh, Yoosuf ibn Ayyoob, to bid him farewell.
He supported my decision [to travel], and said:
‘I advise you not to visit the rulers, and to watch what you eat, [so you are certain] it is not haraam.’
