Al-Qasim bin Abdur-Rahman reported on the authority of his father: Ibn Masud sold slaves to al-Ashath bin Qais. He then narrated the rest of the tradition to the same effect with some variation of words.
Hadith Referenceسنن ابي داود / كتاب الإجارة / 3512
Hadith Gradingالألبانی:صحيح | زبیر علی زئی:حسن, رواه الدارقطني (3/20 ح2836) وصححه ابن الجارود (624) وللحديث شواھد
Hadith Takhrij« سنن ابن ماجہ/ التجارات 19 (2186)، (تحفة الأشراف: 9358)، وقد أخرجہ: مسند احمد (1/466) (صحیح) »
The tradition mention above has also been transmitted by Abu Musa through a different chain if narrators. But there is no mention of demand of repentance.
Hadith Referenceسنن ابي داود / كتاب الحدود / 4357
Hadith Gradingالألبانی:ضعيف الإسناد | زبیر علی زئی:ضعيف, إسناده ضعيف, السند منقطع, القاسم بن عبد الرحمٰن بن عبد اللّٰه بن مسعود لم يذكر عمن سمعه, انوار الصحيفه، صفحه نمبر 154
Hadith Takhrij« تفرد بہ أبو داود، انظر حدیث رقم : (4354)، (تحفة الأشراف: 9096) (ضعیف الإسناد) »
Narrated Abu Dharr: If anyone says in the morning: "O Allah! whatever oath I take, whatever word I speak, and whatever vow I take, Thine will precedes all that: whatever Thou willeth, occurs, and whatever Thou dost not will, dost not occur. O Allah! pardon me and disregard me for it. O Allah! whomsoever Thou sendest thine blessing, to him my blessing is due, and whomsoever thou cursest, to him my curse is due, " exemption from it will be granted to him that day.