Hazrat Anas narrates:

We were with the Messenger of Allah (pbuh) on a journey. Some of us had been observing the fast and some of us had not been fasting. We got down at a place on a hot day. Most of us had the cloth for shelter. There were also those amongst us who sheltered (themselves against the rays of the) sun with the help of their hands. The observers of the fast fell down (on account of weakness). Those who had not observed it got up and pitched tents and watered the mounts.

 Thereupon the Messenger of Allah said:

 The breakers of the fast have taken away the reward today.

 (Bukhari/Jihad 71; Muslim/Siyam 100; Nasai/Sawm 52)

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As it is seen, the consent of Allah is not reached only through prayer and fasting. Serving people and helping them are also kinds of worshipping making you gain rewards.