Matteo 6:4

that thine alms may be in secret; and thy Father which seeth in secret, Himself shall reward thee openly.

Not the act of almsgiving was condemned by Christ, but only the manner. The work was well-pleasing to Him. Give with simplicity of heart, with so little show of self-glorification that even the left hand, so to speak, shall not be admitted into the secret, lest the satisfaction which one may feel on account of having done another good work detract from God's glory. The works shall shine brightly, but the donor shall, remain hidden to all but God, who knows the secrets of men's hearts and actions. He knows all the sacrifices that are made, and at the proper time He will give the reward of mercy; He will make public announcement on the day when He will reveal everything.