The Prophet ﷺ said, "Whoever sells palm trees and sells a slave, both of these are joined together."
حدثنا محمد بن الوليد حدثنا محمد بن جعفر حدثنا شعبة عن عبد ربه بن سعيد عن نافع
عن النبي ﷺ أنه قال من باع نخلا وباع عبدا جمعهما جميعا
No references are available.
Its isnad is sahih. Ahmad narrated it, 2/78, from Muhammad bin Jafar with this chain, and it is found in Sunan al-Kubra by Nasai, no. 4982, in a longer form.