The Prophet (peace and blessings of Allah be upon him) taught us to supplicate to Allah and ask Him for good and blessing in all our circumstances, including when buying and selling, and when marrying.In this Hadith, `Abdullah ibn `Amr ibn Al-`As (may Allah be pleased with them) informs us that the Prophet (peace and blessings of Allah be upon him) said: "When one of you buys a female servant," meaning: a female slave, and in Abu Dawud's narration: "When one of you marries a woman or buys a servant" — and servant includes both male and female — "let him say: 'O Allah, I ask You for her good,'" meaning: her good in herself, "and the good of what You have created her with," meaning: what You have created her with of good character and pleasing disposition. "And I seek refuge in You from her evil and the evil of what You have created her with. Let him supplicate for blessing," meaning: he should ask Allah to bless him through her. "And when one of you buys a camel, let him take hold of the top of its hump" — the top is the highest part of the camel's hump. He is commanded to take hold of the top of its hump and make this supplication to drive away Satan, because the top of the camel is Satan's seat, as he (peace and blessings of Allah be upon him) said: "On the top of every camel is a devil," (Narrated by Ahmad). "Let him supplicate for blessing," meaning: he should ask Allah to bless him through it. "And say the same," meaning: let him supplicate to his Lord to grant him its good and the good of what it was created with, and to protect him from its evil and the evil of what it was created with. This Hadith encourages supplication and turning to Allah in every matter, such as buying and selling..