Caution: Translations of Quran and Ḥadīth may lead to possible misapplications and misinterpretations. This site is intended for students of sacred knowledge that are proficient in comprehending classical Arabic and have a strong foundation in Islamic sciences. Also note that religious injunctions rely on several aspects beyond what one may glean through reading individual aḥādīth.
nasai-kubra:9142ʿAmr b. ʿUthmān b. Saʿīd > Sufyān > al-Zuhrī > ʿĀmir b. Saʿd from his father

[Machine] The Messenger of Allah ﷺ said, "Verily, if Allah wills, you will not spend any expenditure except that you will be rewarded for it, even the morsel of food that you raise to your wife."  

الكبرى للنسائي:٩١٤٢أَخْبَرَنَا عَمْرُو بْنُ عُثْمَانَ بْنِ سَعِيدٍ قَالَ حَدَّثَنَا سُفْيَانُ عَنِ الزُّهْرِيِّ عَنْ عَامِرِ بْنِ سَعْدٍ عَنْ أَبِيهِ قَالَ

قَالَ رَسُولُ اللهِ ﷺ «إِنَّكَ إِنْ شَاءَ اللهُ لَنْ تُنْفِقَ نَفَقَةً إِلَّا أُجِرْتَ حَتَّى اللُّقْمَةِ تَرْفَعُهَا إِلَى فِيِّ امْرَأَتِكَ»  


See similar narrations below:

Collected by Bukhārī, Aḥmad, Suyūṭī

Spending for your wife for the sake of Allah earns you rewards

bukhari:56al-Ḥakam b. Nāfiʿ > Shuʿayb > al-Zuhrī > ʿĀmir b. Saʿd > Saʿd b. Abū Waqqāṣ

Messenger of Allah ﷺ said, "You will be rewarded for whatever you spend for Allah's sake even if it were a morsel which you put in your wife's mouth."  

البخاري:٥٦حَدَّثَنَا الْحَكَمُ بْنُ نَافِعٍ قَالَ أَخْبَرَنَا شُعَيْبٌ عَنْ الزُّهْرِيِّ قَالَ حَدَّثَنِي عَامِرُ بْنُ سَعْدٍ عَنْ سَعْدِ بْنِ أَبِي وَقَّاصٍ

أَنَّهُ أَخْبَرَهُ أَنَّ رَسُولَ اللَّهِ ﷺ قَالَ إِنَّكَ لَنْ تُنْفِقَ نَفَقَةً تَبْتَغِي بِهَا وَجْهَ اللَّهِ إِلَّا أُجِرْتَ عَلَيْهَا حَتَّى مَا تَجْعَلُ فِي فَمِ امْرَأَتِكَ  

ahmad:1480Wakīʿ > Sufyān > Saʿd b. Ibrāhīm > ʿĀmir b. Saʿd from his father

[Machine] "That the Prophet ﷺ said to him, 'Indeed, whatever you spend on your family from provision, you will be rewarded for it, even the morsel of food you raise to your wife.'"  

أحمد:١٤٨٠حَدَّثَنَا وَكِيعٌ حَدَّثَنَا سُفْيَانُ عَنْ سَعْدِ بْنِ إِبْرَاهِيمَ عَنْ عَامِرِ بْنِ سَعْدٍ عَنْ أَبِيهِ

أَنَّ النَّبِيَّ ﷺ قَالَ لَهُ إِنَّكَ مَهْمَا أَنْفَقْتَ عَلَى أَهْلِكَ مِنْ نَفَقَةٍ فَإِنَّكَ تُؤْجَرُ فِيهَا حَتَّى اللُّقْمَةَ تَرْفَعُهَا إِلَى فِي امْرَأَتِكَ  

suyuti:7518a
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السيوطي:٧٥١٨a

"إِنَّكَ لَن تُنْفِقَ نَفقَة تَبْتَغِى بها وجهَ اللَّه إِلَّا أُجِرْتَ بِهَا حَتَّى مَا تَجْعَلُ فِى في امْرَأتِك".  

[خ] البخاري [م] مسلم عن سعد بن أبى وقاص