It was narrated that: Sahl bin Sa'd said: “A woman came to the Prophet (ﷺ) and he said: 'Who will marry her ?' A man said: 'I will.' The Prophet (ﷺ) said: 'Give her something, even if it is an iron ring.' He said: 'I do not have one.' He said: 'I marry her to you for what you know of the Quran.'”
Source: sunnah.com
Other translations
Arabic
حَدَّثَنَا حَفْصُ بْنُ عَمْرٍو، حَدَّثَنَا عَبْدُ الرَّحْمَنِ بْنُ مَهْدِيٍّ، عَنْ سُفْيَانَ، عَنْ أَبِي حَازِمٍ، عَنْ سَهْلِ بْنِ سَعْدٍ، قَالَ جَاءَتِ امْرَأَةٌ إِلَى النَّبِيِّ ـ صلى الله عليه وسلم ـ قَالَ " مَنْ يَتَزَوَّجُهَا " . فَقَالَ رَجُلٌ أَنَا . فَقَالَ لَهُ النَّبِيُّ ـ صلى الله عليه وسلم ـ " أَعْطِهَا وَلَوْ خَاتَمًا مِنْ حَدِيدٍ " . فَقَالَ لَيْسَ مَعِي . قَالَ " قَدْ زَوَّجْتُكَهَا عَلَى مَا مَعَكَ مِنَ الْقُرْآنِ " .
sunnah.com