Sayyiduna Abdullah bin Amr (may Allah be pleased with him) narrates that the Prophet (peace and blessings be upon him) said: "The most excellent charity is making peace between people."
Al-Tabarani and al-Bazzar recorded it. Its chain contains a narrator, Abd al-Rahman bin Ziyad bin An'um, and he is da'if (weak).
Hadith Referenceمجمع الزوائد ومنبع الفوائد / كتاب الأدب / 13055