Sunan an-Nasa'i, Book 26, Hadith 180 (In-Book) ⓘ
It was narrated from Ibn 'Abbas that 'Ali said: "I got married to Fatimah, may Allah be pleased with her, and I said: 'O Messenger of Allah, let me consummate the marriage.' He said: 'Give her something.' I said: 'I do not have anything.' He said: 'Where is your Hutami armor?' I said: 'It is with me.' He said: 'Give it to her.'"
أَخْبَرَنَا عَمْرُو بْنُ مَنْصُورٍ، قَالَ حَدَّثَنَا هِشَامُ بْنُ عَبْدِ الْمَلِكِ، قَالَ حَدَّثَنَا حَمَّادٌ، عَنْ أَيُّوبَ، عَنْ عِكْرِمَةَ، عَنِ ابْنِ عَبَّاسٍ، أَنَّ عَلِيًّا، قَالَ تَزَوَّجْتُ فَاطِمَةَ رضى الله عنها فَقُلْتُ يَا رَسُولَ اللَّهِ ابْنِ بِي . قَالَ " أَعْطِهَا شَيْئًا " . قُلْتُ مَا عِنْدِي مِنْ شَىْءٍ . قَالَ " فَأَيْنَ دِرْعُكَ الْحُطَمِيَّةُ " . قُلْتُ هِيَ عِنْدِي . قَالَ " فَأَعْطِهَا إِيَّاهُ " .
also referenced under: Hadith 3375 (Reference) & Volume 4, Book 26, Hadith 3377 (DarusSalam)