✅Answer:

1 عَلِيِّ بْنِ أَبِي حَمْزَةَ قَالَ: قُلْتُ لِأَبِي إِبْرَاهِيمَ أَحُجُّ وَ أُصَلِّي وَ أَتَصَدَّقُ عَنِ الْأَحْيَاءِ وَ الْأَمْوَاتِ مِنْ قَرَابَتِي وَ أَصْحَابِي قَالَ نَعَمْ تَصَدَّقْ عَنْهُ وَ صَلِّ عَنْهُ وَ لَكَ أَجْرٌ بِصِلَتِكَ إِيَّاهُ

📚Bihar, Vol. 88, p. 310

Ali ibn Abi Hamza said: 'I said to Imam Kadhim (peace be upon him): 'I perform Hajj, pray, and give charity on behalf of my living and deceased relatives and my friends!' The Imam said: 'Yes! Give charity and pray on his behalf, and there will be a reward for you because of your connection with him!'

2 مُعَاوِيَةَ بْنِ عَمَّارٍ قَالَ: قُلْتُ لِأَبِي عَبْداللَّهِ إِنَّ أَبِي قَدْ حَجَّ وَ وَالِدَتِي قَدْ حَجَّتْ وَ إِنَّ أَخَوَيَّ قَدْ حَجَّا وَ قَدْ أَرَدْتُ أَنْ أُدْخِلَهُمْ فِي حَجَّتِي كَأَنِّي قَدْ أَحْبَبْتُ أَنْ يَكُونُوا مَعِي فَقَالَ اجْعَلْهُمْ مَعَكَ فَإِنَّ اللَّهَ جَاعِلٌ لَهُمْ حَجّاً وَ لَكَ حَجّاً وَ لَكَ أَجْراً بِصِلَتِكَ إِيَّاهُمْ

📚Al-Faqih, Vol. 2, p. 460

Muawiyah ibn Ammar said: 'Indeed, my father, mother, and two brothers have performed Hajj, but I intend to include and make them partners in my Hajj, as if I wish they were with me!' The Imam said: 'Include them with you (make them partners in your Hajj), for indeed Allah will grant them a Hajj and He will also grant you a Hajj, and there will be a reward for you because of the connection you made with them!'

3️⃣Muhammad ibn Marwan said: 'Abu Abdullah (peace be upon him) said: 'What prevents a man among you from doing good to his parents, both while they are alive and after they have died? He can pray on their behalf, give charity on their behalf, perform Hajj on their behalf, and fast on their behalf, so that what he has done will be for them, and he will have the like of it, and Allah Almighty will increase his reward with much goodness because of his good deeds and his connection!''

📚Al-Kafi, Vol. 2, p. 159

Imam Sadiq (peace be upon him) said: 'What prevents a man among you from doing good to his parents both while they are alive and after they have died? (In this way, after their death) he prays on their behalf, gives charity on their behalf, performs Hajj on their behalf, and fasts on their behalf, so that the action he does will be for them and he will have the like of it, and Allah Almighty will add much goodness (for him) because of his good deeds and his connection!'

4️⃣Ali ibn Abi Hamza in his book, and he is from the companions of Sadiq and Kadhim, said: 'I asked him about a man who performs Hajj and Umrah, and prays, and fasts, and gives charity on behalf of his parents and his relatives.' He said: 'There is no problem with it! He will be rewarded for what he has done, and there will be another reward for him because of his connection with his relatives!'

📚Bihar, Vol. 88, p. 310

📚Bihar, Vol. 88, p. 312

5 عَنِ الصَّادِقِ قال: تَدْخُلُ عَلَى الْمَيِّتِ فِي قَبْرِهِ الصَّلَاةُ وَ الصَّوْمُ وَ الْحَجُّ وَ الصَّدَقَةُ وَ الْبِرُّ وَ الدُّعَاءُ وَ يُكْتَبُ أَجْرُهُ لِلَّذِي فَعَلَهُ وَ لِلْمَيِّتِ

Imam Sadiq (peace be upon him) said: 'Prayer, fasting, Hajj, charity, righteous deeds, and supplication reach the deceased in their grave, and the reward of it is written for both the one who performed it and the deceased!'

📚Bihar, Vol. 88, p. 314

6 قال أَبُو عَبْداللَّه مَنْ عَمِلَ مِنَ الْمُؤْمِنِينَ عَنْ مَيِّتٍ عَمَلًا أَضْعَفَ اللَّهُ لَهُ أَجْرَهُ وَ يُنَعِّمُ بِهِ الْمَيِّتَ

Imam Sadiq (peace be upon him) said: 'Any believer who performs a deed on behalf of a deceased person, Allah will multiply his reward, and the deceased will also be benefited and enjoy it!'

📚Bihar, Vol. 88, p. 314

7️⃣Umar ibn Yazid said: 'Imam Sadiq (peace be upon him) said: 'Whoever among the believers performs a righteous deed on behalf of a deceased person, Allah will multiply his reward, and He will also place the deceased in comfort and ease with it!'

✅It is clear from the above narrations and others that if a person performs a righteous deed on behalf of the deceased, in addition to the deceased benefiting from that deed, it is also written for the person himself, and his own reward is multiplied, and the reward of the connection is also granted to him!

✅ With this, how appropriate it is for us to dedicate our righteous deeds to our deceased relatives and religious brothers and sisters, and while benefiting them, we also place ourselves in a position of multiplied reward and the reward of the connection.

Therefore, performing a righteous deed on behalf of the deceased not only does not deprive us of its reward, but it also multiplies our reward and benefits the deceased.