Sayyiduna Abu Dharr (may Allah be pleased with him) says: We left the Messenger of Allah (peace and blessings be upon him) in such a state that there was no bird flapping its wings in the air except that he (peace and blessings be upon him) had told us some knowledge about it. Then he (peace and blessings be upon him) said: "Nothing remains that brings one closer to Paradise or takes one further from the Fire except that it has been made clear to you."
Hadith Referenceالمعجم الكبير للطبراني / باب الجيم / 1634