It is narrated from an authentic source that Muhammad bin Muslim went one day to the presence of Imam Muhammad Al-Baqir (as). He was partaking of his meal at the time. The Imam (as) asked the visitor to join him over the fare. After finishing the lunch the Imam (as) said, “O Muhammad! My Grand Father, the Prophet of Islam (S), from the day he was ordained the Prophet (S) till his last breath, never reclined on a bolster during his meals. By Allah! He never took support of anything while eating food.
Never did the Prophet (S) eat bread made out of wheat for three consecutive days! From the day he was ordained the Prophet (S) he never ate his fill of wheat bread! I don’t mean to say that it was not within his means to afford good food! He used to give away hundreds of good camels in charity! If he wished, he could have ordered the best of victuals for himself! In fact Jibrael came thrice to offer to the Prophet (S) the keys to the treasures of the world and said that if he accepted the wealth his status on the Day of Reckoning would not change a wee-bit!
But the Prophet (S), in absolute humility, refused to accept the offer every time it was made to him! The Prophet (S) always tried his best to take care of the needs of persons coming to him for help. If at any time he did not have the means, he would tell the person in absolute humility that he would attend to his needs as soon as he could! Whenever he was endowed with any bounties, he never hoarded them. Many a time he used to vouch Heaven to his visitors and Allah acceded to his wish!”
Reference :Ain-Al Hayat, The Essence of Life