Sunan Ibn Majah, Hadith 1968 ⓘ
It was narrated from 'Aishah: that the Messenger of Allah said: "Choose the best for your sperm, and marry compatible women and propose marriage to them."'
حَدَّثَنَا عَبْدُ اللَّهِ بْنُ سَعِيدٍ، حَدَّثَنَا الْحَارِثُ بْنُ عِمْرَانَ الْجَعْفَرِيُّ، عَنْ هِشَامِ بْنِ عُرْوَةَ، عَنْ أَبِيهِ، عَنْ عَائِشَةَ، قَالَتْ قَالَ رَسُولُ اللَّهِ ـ صلى الله عليه وسلم ـ " تَخَيَّرُوا لِنُطَفِكُمْ وَانْكِحُوا الأَكْفَاءَ وَأَنْكِحُوا إِلَيْهِمْ " .
also referenced under: Book 9, Hadith 2044 (In-Book) & Volume 3, Book 9, Hadith 1968 (DarusSalam)