It is narrated from Sayyiduna Abu Sa'id al-Khudri (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: "Among the signs of a hypocrite are: when he speaks, he lies; when he makes a promise, he breaks it; and when you entrust him, he betrays you."
No one narrated this hadith from Zayd (may Allah have mercy on him) except his son Abd al-Rahman (may Allah have mercy on him), and it is not narrated from Sayyiduna Abu Sa'id (may Allah be pleased with him) except through this route.
Hadith Referenceالمعجم الأوسط / باب الألف / 2950
Hadith Gradingمحدثین:إسناده ضعيف لضعف عبد الرحمن بن زيد بن أسلم
Hadith Takhrij«قال الهيثمي: فيه عبد الرحمن بن زيد بن أسلم وهو ضعيف «مجمع الزوائد ومنبع الفوائد، ج 1، ص 108»»