Physical well-being comes from eating little

I saw a pious man on the seashore wounded by a tiger. 
No medicine could relieve his pain; he suffered much, but he nevertheless constantly thanked Allah, the most High, 
saying, “Praise be to Allah that i have fallen into a calamity and not into sin."

[Abu Abdullah Adhami]

“Physical well-being comes from eating little , mental well-being comes from sinning little , well-being of the heart comes from worrying little , and well-being of the tongue comes from speaking little .” 
- Aidh bin Abdullah al-Qarni
If someone spoke about Hasan al-Basri in a bad way, he would welcome it saying, 

"Welcome to good deeds which I didn't perform, nor tired as a result of them, and in which there is no showing off or arrogance."
"If you make intense supplication and the timing of the answer is delayed, do not despair of it. His reply to you is guaranteed; but in the way He chooses, not the way you choose, and at the moment He desires, not the moment you desire."

[Ibn Ata’allah] in Hikam
“The sign of the love of Allah is the love of the Qur’an, and the sign of the love of Allah and the Qur’an is the love of the Prophet (ﷺ); and the sign of the Prophet’s love is the love of his sunnah, and the sign of the sunnah’s love is the love of the Hereafter; fudthe sign of the Hereafter’s love is detachment from the worldly life, and the sign of detachment from the worldly life is taking only sustenance needed to attain Paradise in the Hereafter.” - Sahl ibn Sa`d

Al-Fudayl b. ‘Ayyâd:

"When backbiting appears, brotherhood for Allah will disappear; and at that time you will be like things plated with gold and silver: wooden on the inside, [merely] looking good on the outside."

(Abû Nu’aym, Hilyah Al-Awliyâ`, Vol. 3 p395.)