English
It is narrated from Ibn 'Umar (may Allah be pleased with him) that he said: The Prophet (peace be upon him) entered the Ka'bah, then came out with Bilal behind him. I asked Bilal, "Did he pray?" He said, "No." The next day, he entered again, and I asked Bilal, "Did he pray?" He said, "Yes, he prayed two Rak'ahs."
Qur’an-related source paragraphs
And the saying of Allah, the Almighty: "And We commanded Ibrahim and Isma'il: 'Purify My House for those who perform Tawaf, those who stay in I'tikaf, and those who bow and prostrate.'" (Qur'an, Al-Baqarah 2:125). And His saying: "Wherever you are, turn your faces toward it." (Qur'an, Al-Baqarah 2:144). And His saying: "Indeed, the first House [of worship] established for mankind was that at Makkah—blessed and a guidance for the worlds." (Qur'an, Al-Imran 3:96). And His saying: "In houses which Allah has ordered to be raised and in which His name is remembered." (Qur'an, An-Nur 24:36). And His saying: "The mosques of Allah are only to be maintained by those who believe in Allah and the Last Day." (Qur'an, At-Tawbah 9:18).