Hadith 17:806
Shababa narrated to us, he said: Ibn Abi Dhi'b narrated to us, from al-Harith, from Abu Salama, from Sa'id ibn Zayd, he said: I bear witness that I heard the Messenger of Allah, may Allah bless him and grant him peace, say: "Whoever takes a client (mawla) without his permission, upon him is the curse of Allah."
حدثنا شبابة قال حدثنا بن أبي ذئب عن الحارث عن أبي سلمة عن سعيد بن زيد قال أشهد أن رسول الله صلى الله عليه وسلم سمعته يقول من تولى مولى بغير إذنه فعليه لعنة الله