وَعنهُ كُنَّا نَعْزِلُ وَالْقُرْآنُ يَنْزِلُ. مُتَّفَقٌ عَلَيْهِ. وَزَادَ مُسْلِمٌ: فَبَلَغَ ذَلِكَ النَّبِيَّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ فَلم ينهنا
He said that in the period when the Qur'an was coming down they used to withdraw the penis.* * i.e. before emission of semen, to avoid conception. (Bukhari and Muslim.) Muslim added that the Prophet heard of that and did not prohibit it.
Source: Mishkat al-Masabih — repository translation · Al-Khatib Al-Tabrizi — authenticity/grade metadata requires independent source review · Sunnah.comAudio not available for the selected reciter.
Source: Mishkat al-Masabih — repository arabic · Al-Khatib Al-Tabrizi · Sunnah.com