2158 — Al-Nufayli narrated to us, Muhammad ibn Salamah narrated to us, from Muhammad ibn Ishaq, who said: Yazid ibn Abi Habib narrated to me, from Abi Marzuq, from Hanash al-San'ani, from Ruwayfi' ibn Thabit al-Ansari, who said: He stood among us as a speaker and said: Indeed, I say to you nothing but what I heard the Messenger of Allah ﷺ say on the Day of Hunayn. He said: "It is not lawful for a man who believes in Allah and the Last Day to water with his water the crop of another" — meaning intercourse with pregnant captives — "and it is not lawful for a man who believes in Allah and the Last Day to have intercourse with a woman from the captives until he has ensured her womb is clear, and it is not lawful for a man who believes in Allah and the Last Day to sell spoils of war before they are distributed."(1)

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It was also recorded by Ahmad in his "Musnad" (11228) and (11596) and (11823), by al-Tahawi in "Sharh Mushkil al-Athar" (3048) and (3049), and by al-Bayhaqi in "al-Kubra" 9/124 and in "Ma'rifat al-Sunan wa al-Athar" (18300) via multiple chains from Sharik, from him. Some of them paired Abu Ishaq with Qays ibn Wahb, and some paired Mujalid with him.
See what precedes it.
It has a supporting witness in the hadith of Ruwayfi' ibn Thabit al-Ansari that follows it. And its chain is good (hasan).
Another supporting hadith is from Ibn 'Abbas, recorded by al-Daraqutni 3/257. Its chain is weak.
And a third from 'Ali, recorded by Ibn Abi Shaybah in his "Musannaf" 4/370. Its chain is weak.

(1) Sahih bi-ghayrihi (authentic due to corroborating evidence), and this chain is good (hasan) on account of Muhammad ibn Ishaq, and he explicitly stated that he was narrating by hearing, so any suspicion of tadlis is removed. Al-Nufayli: he is 'Abdullah ibn Muhammad ibn 'Ali ibn Nufayl, and Abu Marzuq: he is Habib ibn al-Shahid, the freed slave of Tujib, and Hanash al-San'ani: he is Ibn 'Abdullah.
It was also recorded in abbreviated form by al-Tirmidhi (1161) via the route of Busr ibn 'Ubaydullah, from Ruwayfi'.
He said: A hasan hadith.
It is in "Musnad Ahmad" (16997) and "Sahih Ibn Hibban" (4850).
See its supporting witnesses in "Musnad Ahmad" (16990).
See what follows it.
Al-Khattabi said: The Prophet ﷺ compared the child, when it attaches to the womb, to the crop when it sprouts and takes root in the earth. In this is the disapproval of intercourse with a pregnant woman, if the pregnancy is from someone other than the one having intercourse, in all respects.