What is the meaning of the three aforementioned Hadiths, and how can they be reconciled?

The first Hadith, concerning the prohibition of a loan combined with a sale (salf wa bai'), and two conditions in a sale, has been a subject of scholarly disagreement regarding its authenticity and legal interpretation. Some scholars favored the view that the correct wording is: "He (the Prophet) prohibited a loan combined with a sale, two conditions in a sale, and profiting from what has not been guaranteed." Others, however, considered a single condition permissible.

As for the second Hadith, with the wording "stipulate for them the wala' (right of inheritance/patronage)," scholars have also differed on it. Some affirmed its authenticity and interpreted it, while others contested its validity and mentioned that Imam Al-Shafi'i believed it was not permissible for the Prophet (peace be upon him) to command something invalid.

The third Hadith, concerning the camel's load, is authentically reported in the Sahihayn with various wordings, including: "Sell it to me, and its back (i.e., its use for transport) is yours until Medina." This indicates the permissibility of stipulating a known benefit in the sold item.

The issues surrounding conditions in sales have led to extensive disagreement, both in the past and present, due to the conflicting nature of some narrated traditions. Some scholars are of the opinion that the basic principle regarding contracts and conditions is permissibility and validity, unless there is specific evidence indicating their prohibition or nullification.