Most Pleasing Deed
Abu Zarr (R.A.) narrated "Once during the cold weather the Messenger of Allah (SAW) went out and the leaves of the trees were falling (as it was the autumn). The Prophet (SAW) caught hold of two branches of a tree (and shook them) and its leaves began to fall suddenly. Addressing me, he said, 'Abu Zarr (R.A.).' 'I am here, O Messenger of Allah'. I replied. 'When a person offers prayer solely for the sake of Allah', said the Prophet, 'his sins fall away like these leaves.'" (Musnad Ahmad)