From Sahih Muslim (Hadith 3243):
A'isha (Allah be pleased with her), wife of Allah's Apostle (ﷺ), heard Allah's Messenger (ﷺ) as saying:If your people, had not been recent converts to Islam, I would have spent the treasure of the Ka'ba in the way of Allah and would have constructed its door just on the level of the ground and would have encompassed in it the space of Hijr
Reference: Muslim 3243