Assalam alaikum,
In Ayat 28 of Surat Kahfi of the Holy Qur'an (18:28), Allah Subhanahu Wa Ta'ala says:--

"AND KEEP YOURSELF PATIENTLY WITH THOSE WHO CALL ON THEIR LORD
MORNING AND EVENING, SEEKING HIS FACE."

These true servants of Allah Ta'ala (the Ahl al-Suffah, who lived in the Masjid on a raised platform to be near the Prohet, peace be upon him), whose hearts are turned to Allah morning, noon and night, were moulded by the vast character of the Messenger of Allah, peace be upon him. He was the most complete man in zuhd (doing without), wara'a (scrupulousness in abstinence), fear of Allah, hope in Allah, struggle for Allah, reliance on Allah, acceptance of Allah, Contentment, love, mercy, pity, forbearance, generosity, courage and knowledge. The Ahl al-Suffah, may Allah be pleased with them, imbibed all this from the Prophet, Sallallahu alaihi Wasallam.

Describing them, Sayyadi Ibn Ajiba, may Allah be Merciful to him, said:--

"They left dunya to its people and isolated themselves completely for Allah.
When they heard the speech of their Lord and their Prophet they understood
the requirements of the Divine Law. Allah and His Prophet denounced dunya
and occupation with it. They praised and embraced complete freedom for
ibada (worship) and ijtihad (struggle) in it. Allah had described what He prepared
for the Zahidin (abstinent) and Qanitinin (obedient). So they left the causes (asbab),
which is the Law of the weak, for tajrid (stripping off), which is the Law of the
strong and the reality of the sincere friends of Allah."
For Allah Azzah Wa Jallah, the Ahl al-Suffah left everything they possessed.... thus every Sufi is related to them in one way or another. May Allah Ta'ala Grant us the baraka of these humble servants of His.