وَقَالَ اَلصَّادِقُ عَلَيْهِ اَلسَّلاَمُ: «مَنْ صَلَّى اَلْمَغْرِبَ ثُمَّ عَقَّبَ وَ لَمْ يَتَكَلَّمْ حَتَّى يُصَلِّيَ رَكْعَتَيْنِ كُتِبَتَا لَهُ فِي عِلِّيِّينَ فَإِنْ صَلَّى أَرْبَعاً كُتِبَتْ لَهُ حَجَّةٌ مَبْرُورَةٌ.
English translationBab Ul Qaim Publications
Hadith.665 - Imam Jafar ibn Muhammad Al-Sadiq (as) said: "Whoever prays Maghrib and then follows it immediately with the post-prayer (Ta'qeeb) supplication without speaking, and performs two units of prayer (Rak'ahs), they are recorded for him among those in 'Illiyyīn (the highest rank in Paradise). If he prays four units (Rak'ahs), it will be written for him as an accepted pilgrimage (Hajj Mabroor)."
Translation: Bab Ul Qaim Publications·Thaqalayn link·The Arabic above is the original.