Hadith 35:2
Sahih (Al-Albani)
Ibn al-Hanafiyya was heard to say, "There was an allowance made for 'Ali. He asked, 'Messenger of Allah, if I have a son after you can I name him with your name and use your kunya?' Yes,' he replied."
حَدَّثَنَا أَبُو نُعَيْمٍ، قَالَ: حَدَّثَنَا فِطْرٌ، عَنْ مُنْذِرٍ قَالَ: سَمِعْتُ ابْنَ الْحَنَفِيَّةِ يَقُولُ: كَانَتْ رُخْصَةً لِعَلِيٍّ، قَالَ: يَا رَسُولَ اللهِ، إِنْ وُلِدَ لِي بَعْدَكَ أُسَمِّيهِ بِاسْمِكَ، وَأُكَنِّيهِ بِكُنْيَتِكَ؟ قَالَ: نَعَمْ
Original Reference: Al-Adab Al-Mufrad 843