(11) Business Transactions
كتاب البيوع
(17b) Chapter - Section 2
(17) باب - الفصل الثاني
Mishkat al-Masabih 3027 
‘A’isha reported the Prophet as saying, "Give presents to one another, for a present removes grudges.” …transmitted it. (Mirqat, 3:380 says that Tirmidhi is the source in which this tradition is found. I have looked for it with the help of the Concordance, but have been unable to find it.
وَعَنْ عَائِشَةَ عَنِ النَّبِيِّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ قَالَ: «تَهَادُوا فَإِنَّ الْهَدِيَّةَ تُذْهِبُ الضَّغَائِنَ» . رَوَاهُ
 ضَعِيف  (الألباني)حكم :
Reference : Mishkat al-Masabih 3027
In-book reference : Book 11, Hadith 261