Sayyiduna Imam Zain al-Abidin (may Allah be pleased with him) narrates from his father (Sayyiduna Imam Husayn, may Allah be pleased with him) that the Prophet Muhammad (peace and blessings be upon him) said: "Indeed, the miser is the one in whose presence my mention is made and he does not send blessings upon me."
(Imam Ibn Hibban, may Allah have mercy on him, says:) This is the most authentic narration transmitted from Sayyiduna Imam Husayn (may Allah be pleased with him). Because at the time when the Noble Prophet (peace and blessings be upon him) passed away, Sayyiduna Imam Husayn (may Allah be pleased with him) was one month short of seven years old. That is, he was born in the month of Sha'ban in the 4th year of Hijrah, and when he was six years and a few months old, he was memorizing many things in Arabic one after another.
Hadith Referenceصحیح ابن حبان / كتاب الرقائق / 909
Hadith Gradingفضيلة الشيخ الإمام محمد ناصر الدين الألبانيصحيح - «فضل الصلاة على النبي صلى الله عليه وسلم» (31 - 35).فضيلة الشيخ العلّامة شُعيب الأرناؤوطإسناده قوي، رجاله ثقات رجال مسلم ما عدا عبد الله بن علي، وقد روى عنه جمع، ووثقه المؤلف، وقال الذهبي في " الكاشف": ثقة.