Silsilah as-Sahihah 286 — Heart characterized by faith, truthfulness

It is narrated from Sayyiduna Abu Hurairah (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: "Faith and disbelief cannot both be combined in a man's heart, and likewise, truth and falsehood cannot be combined, nor can betrayal and trustworthiness be gathered together."