"A man called out to the Prophet and said: 'We used to sacrifice the 'Atirah - i.e., during the Jahiliyyah - in Rajab; what do you command us to do?' He said: 'Sacrifice, whatever month it is, do good for the sake of Allah, the Mighty and Sublime, and feed (the poor).' He said: 'We used to sacrifice the Fara' during the Jahiliyyah; what do you command us to do?' He said: 'For every flock of grazing animals, feed the firstborn as you feed the rest of your flock until it reaches an age where it could be used to carry loads, then sacrifice it, and give its meat in charity, for that is good."'
Sunan an-Nasa'i Book 41, Hadith 10
Yahya related to me from Malik from Abdullah ibn Dinar from
Abdullah ibn Umar that a man mentioned to the Messenger of Allah, may
Allah bless him and grant him peace, that he was always being cheated
in business transactions. The Messenger of Allah, may Allah bless him
and grant him peace, said, "When you enter a transaction, say, 'No
trickery.' So whenever that man entered a transaction, he would say,
'No trickery.' "
Muwatta Malik Book 31, Hadith 99
Yahya related to me from Malik from Sumayy, the mawla of Abu
Bakr, from Abu Salih as Samman, from Abu Hurayra that the Messenger of
Allah, may Allah bless him and grant him peace, said, "When the imam
has said, 'not of those with whom You are angry nor of those who are
in error,' say 'Amin', for the previous wrong actions of the one whose
utterance coincides with that of the angels, are forgiven him."
Muwatta Malik Book 3, Hadith 48