Musannaf Ibn Abi Shaybah

It is narrated from Yunus, he says that whenever Hasan mentioned Hazrat Umar (may Allah be pleased with him), he would say: By Allah! He was not the first among the companions to accept Islam. And among the rest of the companions (may Allah be pleased with them), he was not superior in spending in the way of Allah either. But still, among the companions (may Allah be pleased with them), he excelled all in detachment from the world and steadfastness in obeying Allah's command. And in matters concerning Allah, he did not fear the blame of any blamer.