The phrase "Fal'ya budu Rabba hadhal Bayt" is an Arabic phrase that is taken from Surat Al-Fil, which means "let them worship the Lord of this house." In this surah, Allah recounts the story of how He saved the Kaaba from the attack of Abraha and his army of elephants, and thus emphasizes the importance of worshipping the One and Only God. The phrase "Fal'ya budu Rabba hadhal Bayt" serves as a reminder to the believers that the Kaaba is a sacred place of worship that should be dedicated solely to the worship of Allah, and that all acts of worship should be directed towards Him alone.