I saw the Prophet ﷺ carrying Al-Hasan on his shoulder an saying, "O Allah! I love him, so please love him." (Using translation from Bukhārī 3749)
رَأَيْتُ رَسُولَ اللهِ ﷺ وَالْحَسَنُ عَلَى عَاتِقِهِ وَهُوَ يَقُولُ «اللهُمَّ إِنِّي أُحِبُّ هَذَا فَأَحِبَّهُ»