Hadith Number Six
Hazrat Anas bin Maalik R.A. reports that Rasulullah Sal’am said: ‘The salaat which a person performs in his house is one salaat; and his salaat in the local masjid is equal to 25 salaats: and his salaat in the Jaame Masjid where the people gather is rewarded to the extent of five hundred salaats; and his salaat in the mosque of Jerusalem, Masjidul Aqsaa is rewarded to the extent of fifty thousand salaats: and his salaat in my mosque-Masjidul Nabawi in the Holy Mosque of Makkah is rewarded to the extent of one hundred thousand salaats’
The fact that salaat in the Holy Mosque of Makkah is rewarded up to one hundred thousand times be borne out by many ahaadith.