Sayyiduna Hudhayfah (may Allah be pleased with him) narrates: I heard the Prophet (peace and blessings be upon him) say: "Whoever makes an agreement with his brother on a condition that he does not intend to fulfil is like one who lands his neighbour in a predicament from which he cannot escape."
Ahmad recorded it; its chain contains al-Hajjaj bin Artah, who is thiqah (trustworthy) and a mudallis, and the rest of its narrators are the narrators of the Sahih.
Hadith Referenceمجمع الزوائد ومنبع الفوائد / كتاب الأحكام / 7060
Sayyiduna Rafi' bin Khadij (may Allah be pleased with him) narrates: The Prophet (peace and blessings be upon him) said: "Muslims are bound by their conditions, provided they are lawful" (or: provided they concern what is lawful).
Al-Tabarani recorded it in al-Mu'jam al-Kabir; its chain contains Hakim bin Jubayr, who is matruk (abandoned), while Abu Zur'ah said: His standing is that of truthfulness, if Allah wills.
Hadith Referenceمجمع الزوائد ومنبع الفوائد / كتاب الأحكام / 7061
Hadith Gradingمحدثین:ضعیف جداً
Hadith Takhrij«اخرجه الطبراني فى المعجم الكبير (4404) ، أخرجه المعجم الكبير للطبراني برقم: 4404»
Sayyiduna Abdullah bin Abbas (may Allah be pleased with them both) narrates: The Prophet (peace and blessings be upon him) said: "Every condition that is not permitted in the Book of Allah is void, even if they be a hundred conditions."
Al-Tabarani recorded it in al-Mu'jam al-Kabir; its chain contains Amr bin Yahya bin Afrah, and I have not found anyone who has written his biography; the rest of its narrators are thiqat (trustworthy).
Hadith Referenceمجمع الزوائد ومنبع الفوائد / كتاب الأحكام / 7062
Hadith Gradingمحدثین:إسناده ضعیف
Hadith Takhrij«أخرجه المعجم الكبير للطبراني برقم: 10869»