Every nation has an extremely trustworthy man, and the most trustworthy man of this Ummah is Abu ‘Ubaydah ibn al-Jarrāh
Authentic hadithعن أنس بن مالك رضي الله عنه مرفوعًا: «إنَّ لكل أُمَّة أمِينًا، وإنَّ أمِيننا -أيتُها الأمة- أبو عُبيدة بن الجَرَّاح».
Anas ibn Mālik (may Allah be pleased with him) reported that the Prophet (may Allah's peace and blessings be upon him) said: "Every nation has an extremely trustworthy man, and the most trustworthy man of this Ummah is Abu ‘Ubaydah ibn al-Jarrāh."
Explanation
Every nation has an extremely trustworthy man known for his honesty more than others. The person who is most well-known for his honesty and trustworthiness in the Muslim nation is Abu ‘Ubaydah ibn al-Jarrāh (may Allah be pleased with him). Although honesty is a common characteristic of all the Companions (may Allah be pleased with him) yet the context of the Hadīth shows that Abu ‘Ubaydah has a higher level of trustworthiness than others.
Source · Narrated by Bukhari & Muslim
From the Hadith Encyclopedia (hadeethenc.com).