It is narrated from Hazrat Abu Darda (may Allah be pleased with him) that the Noble Prophet (peace and blessings be upon him) said: A sign of a person's wisdom is that he adopts moderation in his financial affairs.
Hadith Referenceمسند احمد / مسند الأنصار رضي الله عنهم / 21695
Hadith Gradingحکم دارالسلام:إسناده ضعيف لضعف أبى بكر بن أبى مريم