Ibrahim declared Mecca as sacred and I declare sacred the area between its two stony grounds (lava lands by which he meant Medina).
Sahih Muslim Book 15, Hadith 519
← Previous Hadith This hadith has been narrated through another chain of transmitters with a slight variation of words.

Sahih Muslim Book 15, Hadith 518 Next Hadith → What is this that I hear you making mention of Mecca and its inhabitants and its sacredness, but you did not make mention of Medina and its inhabitants and its sacredness, while the Messenger of Allah (ﷺ) has also declared sacred (the area) between its two lava lands (Medina)? And (we have record of this) with us written on Khaulani parchment. If you like, I can read it out to you. Thereupon Marwan became silent, and then Said: I too have heard some part of it.

Sahih Muslim Book 15, Hadith 520