Sa'id ibn al-Musayyib سعيد بن المسيب بن حزن أبو محمد القرشي · Wages (Kitab Al-Ijarah)

Do not go our to meet what is being brought (to market for sale). If anyone does so and buys some of it, the owner of merchandise has a choice (of canceling the deal) when it comes to the market. Abu 'Ali said: I heard Abu Dawud say: Sufyan said: none of you must buy in opposition to one another ; that is he says: I have a better one for ten (dirhams).

The Prophet (ﷺ) said: If anyone buys a sheep whose udders have been tied up, he has option for three days (for decision). If he returns it, he should return with it wheat equal to its milk or double of it.

The Messenger of Allah (ﷺ) decreed the right to buy the neighboring property applicable to everything which is not divided, but when boundaries are fixed and separate roads made, there is no option.

The Prophet (ﷺ) said: I swear by Allah, I shall not accept gift from anyone after this day except from an immigrant Qarashi, an Ansari a Dawsi or a Thaqafi.