The Cow - 2:125
"We have made the Ka´bah a focal point for the people and a place of safety. Use the seat of Abraham as a place of prayer. "We commissioned Abraham and Ishmael to keep My House clean for the visitors and those who devote themselves to worship and those who bow down and prostrate themselves."
What does it mean that the Ka'bah is the focal point?
The Cow/2:150
Wherever you set out, turn your face towards the Holy Mosque (for prayer). Wherever you are, turn your faces towards it, so that the people may not criticize you. As for the wrongdoers, do not fear them, but fear Me, so that I may complete My favor upon you and you may reach the truth.