The Messenger of Allah [SAW] was asked: "Which deed is best?" "He said: Faith in Allah [SWT] and His messenger [SAW]."  

أَنَّ رَسُولَ اللَّهِ ﷺ سُئِلَ أَىُّ الأَعْمَالِ أَفْضَلُ قَالَ الإِيمَانُ بِاللَّهِ وَرَسُولِهِ  

The Prophet [SAW] was asked: "Which deed is best?" He said: "Faith in which there is no doubt, Jihad in which there is no Ghulul, and Hajjatun Mabrur."  

أَنَّ النَّبِيَّ ﷺ سُئِلَ أَىُّ الأَعْمَالِ أَفْضَلُ فَقَالَ إِيمَانٌ لاَ شَكَّ فِيهِ وَجِهَادٌ لاَ غُلُولَ فِيهِ وَحَجَّةٌ مَبْرُورَةٌ