The Complete Pilgrimage Guide · Hadith 419 (#Ḥadīth #3)
Chapter 63 | The Reward for the Ziyārah of Ĥusain Is Equal to the Reward of Performing an ‘Umrah
3 وَ عَنْهُ عَنْ مُحَمَّدِ بْنِ الْحُسَيْنِ عَنْ مُحَمَّدِ بْنِ سِنَانٍ قَالَ سَمِعْتُ الرِّضَا (ع) يَقُولُ زِيَارَةُ قَبْرِ الْحُسَيْنِ (ع) تَعْدِلُ عُمْرَةً مَبْرُورَةً مُتَقَبَّلَةً
3. Muḥammad ibn Ja’far narrated to me from Muḥammad ibn Ḥusain, from Muḥammad ibn Sinān, who said: I heard Imam Riďā say: Going to the Ziyārah of the grave of Ḥusain is equal to performing a purified and accepted ‘Umrah.
Gradings are classical jarḥ-wa-taʿdīl, name-matched to a rijāl index (not individually re-verified).