كتاب الحدود
29  
The Book of Legal Punishments
(7)
Chapter: Delaying the Hadd punishment in the case of women who have just given birth
(7)
باب تَأْخِيرِ الْحَدِّ عَنِ النُّفَسَاءِ، ‏‏
Sahih Muslim 1705 b

This hadith has been narrated on the authority of as-Suddi with the same chain of trznsmitters, but he did not mention:

" Those who are married and those who are not married." There is also an addition in it:" I spare her until she is all right."
وَحَدَّثَنَاهُ إِسْحَاقُ بْنُ إِبْرَاهِيمَ، أَخْبَرَنَا يَحْيَى بْنُ آدَمَ، حَدَّثَنَا إِسْرَائِيلُ، عَنِ السُّدِّيِّ، بِهَذَا الإِسْنَادِ وَلَمْ يَذْكُرْ مَنْ أَحْصَنَ مِنْهُمْ وَمَنْ لَمْ يُحْصِنْ ‏.‏ وَزَادَ فِي الْحَدِيثِ ‏ "‏ اتْرُكْهَا حَتَّى تَمَاثَلَ ‏"‏ ‏.‏
Reference : Sahih Muslim 1705b
In-book reference : Book 29, Hadith 54
USC-MSA web (English) reference : Book 17, Hadith 4225
  (deprecated numbering scheme)