Narrated Suhaib (RA): The Prophet ( صلی اللہ علیہ وسلم ) said: "There are three things which contain blessings: A business transaction in which payment is agreed on a fixed later time, al-Muqaradah (speculative partnership), and mixing wheat and barley for one's household use but not for sale." [Reported by Ibn Majah through a Da'if (weak) chain of narrators] .