‘And ‘Umar (may Allah be pleased with him) said: The fulfillment of rights is established only by fulfilling the conditions, and you will receive according to the condition. Al-Miswar narrated that I heard the Prophet (peace and blessings of Allah be upon him) mention one of his sons-in-law, and he greatly praised him for fulfilling the rights of kinship, and said: Whenever he spoke to me, he spoke the truth, and whenever he made a promise, he fulfilled it.’

Narrated `Uqba bin Amir: Allah's Apostle said, "From among all the conditions which you have to fulfill, the conditions which make it legal for you to have sexual relations (i.e. the marriage contract) have the greatest right to be fulfilled."

Narrated Rafi bin Khadij: We used to work on the fields more than the other Ansar, and we used to rent the land (for the yield of a specific portion of it). But sometimes that portion or the rest of the land did not give any yield, so we were forbidden (by the Prophet) to follow such a system, but we were allowed to rent the land for money.

Narrated Abu Huraira: The Prophet said, "No town-dweller should sell for a bedouin. Do not practice Najsh (i.e. Do not offer a high price for a thing which you do not want to buy, in order to deceive the people). No Muslim should offer more for a thing already bought by his Muslim brother, nor should he demand the hand of a girl already engaged to another Muslim. A Muslim woman shall not try to bring about The divorce of her sister (i.e. another Muslim woman) in order to take her place herself."

Narrated Abu Huraira and Zaid bin Khalid Al-Juhani: A bedouin came to Allah's Apostle and said, "O Allah's apostle! I ask you by Allah to judge My case according to Allah's Laws." His opponent, who was more learned than he, said, "Yes, judge between us according to Allah's Laws, and allow me to speak." Allah's Apostle said, "Speak." He (i .e. the bedouin or the other man) said, "My son was working as a laborer for this (man) and he committed illegal sexual intercourse with his wife. The people told me that it was obligatory that my son should be stoned to death, so in lieu of that I ransomed my son by paying one hundred sheep and a slave girl. Then I asked the religious scholars about it, and they informed me that my son must be lashed one hundred lashes, and be exiled for one year, and the wife of this (man) must be stoned to death." Allah's Apostle said, "By Him in Whose Hands my soul is, I will judge between you according to Allah's Laws. The slave-girl and the sheep are to be returned to you, your son is to receive a hundred lashes and be exiled for one year. You, Unais, go to the wife of this (man) and if she confesses her guilt, stone her to death." Unais went to that woman next morning and she confessed. Allah's Apostle ordered that she be stoned to death.

Narrated Abu Huraira and Zaid bin Khalid Al-Juhani: A bedouin came to Allah's Apostle and said, "O Allah's apostle! I ask you by Allah to judge My case according to Allah's Laws." His opponent, who was more learned than he, said, "Yes, judge between us according to Allah's Laws, and allow me to speak." Allah's Apostle said, "Speak." He (i .e. the bedouin or the other man) said, "My son was working as a laborer for this (man) and he committed illegal sexual intercourse with his wife. The people told me that it was obligatory that my son should be stoned to death, so in lieu of that I ransomed my son by paying one hundred sheep and a slave girl. Then I asked the religious scholars about it, and they informed me that my son must be lashed one hundred lashes, and be exiled for one year, and the wife of this (man) must be stoned to death." Allah's Apostle said, "By Him in Whose Hands my soul is, I will judge between you according to Allah's Laws. The slave-girl and the sheep are to be returned to you, your son is to receive a hundred lashes and be exiled for one year. You, Unais, go to the wife of this (man) and if she confesses her guilt, stone her to death." Unais went to that woman next morning and she confessed. Allah's Apostle ordered that she be stoned to death.

Narrated Aiman Al-Makki: When I visited Aisha she said, "Buraira who had a written contract for her emancipation for a certain amount came to me and said, "O mother of the believers! Buy me and manumit me, as my masters will sell me." Aisha agreed to it. Buraira said, 'My masters will sell me on the condition that my Wala will go to them." Aisha said to her, 'Then I am not in need of you.' The Prophet heard of that or was told about it and so he asked Aisha, 'What is the problem of Buraira?' He said, 'Buy her and manumit her, no matter what they stipulate.' Aisha added, 'I bought and manumitted her, though her masters had stipulated that her Wala would be for them.' The Prophet said, The Wala is for the liberator, even if the other stipulated a hundred conditions."

Ibn al-Musayyib, Hasan, and Ata said: Whether the condition is stated afterwards or beforehand, in every case action will be according to the condition.

Narrated Abu Huraira: Allah's Apostle forbade (1) the meeting of the caravan (of goods) on the way, (2) and that a residing person buys for a bedouin, (3) and that a woman stipulates the divorce of the wife of the would-be husband, (4) and that a man tries to cause the cancellation of a bargain concluded by another. He also forbade An-Najsh (see Hadith 824) and that one withholds the milk in the udder of the animal so that he may deceive people on selling it.

Narrated Ubai bin Ka`b: Allah's Apostle said, "Moses the Apostle of Allah," and then he narrated the whole story about him. Al-Khadir said to Moses, "Did not I tell you that you can have no patience with me." (18.72). Moses then violated the agreement for the first time because of forgetfulness, then Moses promised that if he asked Al-Khadir about anything, the latter would have the right to desert him. Moses abided by that condition and on the third occasion he intentionally asked Al-Khadir and caused that condition to be applied. The three occasions referred to above are referred to by the following Verses: "Call me not to account for forgetting And be not hard upon me." (18.73) "Then they met a boy and Khadir killed him." (18.74) "Then they proceeded and found a wall which was on the verge of falling and Khadir set it up straight." (18.77)