The Prophet (sall'Allahu 'alayhi wa sallam) said: "Shall I not inform you of what I fear for you more than the Maseeh-id-Dajjaal? It is the hidden shirk. It is when a man stands up for prayer, and he beautifies his prayer because he sees the people looking at him."
(Sunan Ibn Majah Vol 2, 3389)












