It is obligatory to spend for one‘s wife and household.

Narrated Abu Huraira:

"The Prophet ﷺ said, 'The best alms is that which is given when one is rich, and a giving hand is better than a taking one, and you should start first to support your dependents.' A wife says, 'You should either provide me with food or divorce me.' A slave says, 'Give me food and enjoy my service." A son says, "Give me food;
to whom do you leave me?" The people said, "O Abu Huraira! Did you hear that from Allah's Apostle ?" He said, "No, it is from my own self."

حَدَّثَنَا عُمَرُ بْنُ حَفْصٍ، حَدَّثَنَا أَبِي، حَدَّثَنَا الأَعْمَشُ، حَدَّثَنَا أَبُو صَالِحٍ، قَالَ حَدَّثَنِي أَبُو هُرَيْرَةَ ـ رضى الله عنه ـ قَالَ قَالَ النَّبِيُّ ﷺ " أَفْضَلُ الصَّدَقَةِ مَا تَرَكَ غِنًى، وَالْيَدُ الْعُلْيَا خَيْرٌ مِنَ الْيَدِ السُّفْلَى، وَابْدَأْ بِمَنْ تَعُولُ ". تَقُولُ الْمَرْأَةُ إِمَّا أَنْ تُطْعِمَنِي وَإِمَّا أَنْ تُطَلِّقَنِي. وَيَقُولُ الْعَبْدُ أَطْعِمْنِي وَاسْتَعْمِلْنِي. وَيَقُولُ الاِبْنُ أَطْعِمْنِي، إِلَى مَنْ تَدَعُنِي فَقَالُوا يَا أَبَا هُرَيْرَةَ سَمِعْتَ هَذَا مِنْ رَسُولِ اللَّهِ ﷺ. قَالَ لاَ هَذَا مِنْ كِيسِ أَبِي هُرَيْرَةَ.