[Machine] I attended the Messenger of Allah, ﷺ , among a group of people, and he was saying, "I have intended to prohibit Ghilah (a type of pre-Islamic trade) but then I looked at the Romans and the Persians, and they trade Ghilah and it does not harm their children." They asked him about "Al-'Azl" (coitus interruptus), so the Messenger of Allah, ﷺ , said, "The hidden secretion [i.e. sperm] is meant" (referring to the verse in the Quran that mentions "Maw'udah" - a term used before the revelation that made contraception through coitus interruptus forbidden).  

حَضَرْتُ رَسُولَ اللهِ ﷺ فِي أُنَاسٍ وَهُوَ يَقُولُ لَقَدْ هَمَمْتُ أَنْ أَنْهَى عَنِ الْغِيلَةِ فَنَظَرْتُ فِي الرُّومِ وَفَارِسَ فَإِذَا هُمْ يُغِيلُونَ أَوْلَادَهُمْ فَلَا يَضُرُّ أَوْلَادَهُمْ شَيْئًا وَسَأَلُوهُ عَنِ الْعَزْلِ فَقَالَ رَسُولُ اللهِ ﷺ الْوَأْدُ الْخَفِيُّ {وَإِذَا الْمَوْءوُدَةُ} سُئِلَتْ