It is narrated from Sayyiduna Anas (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) forbade muhaqalah (selling standing grain in the field in exchange for harvested grain), mukhadarah (selling fruit before it ripens) and munabadhah (making a sale binding by throwing a garment without inspecting it). Ustadh Abu al-Walid said: Mukhadarah means that none of it is to be sold until it turns red or yellow (that is, until it ripens). This hadith has a sahih (authentic) chain, and Imam Bukhari is alone in recording it.