Hind came to the Prophet ﷺ and said: Messenger of Allah, Abu Sufyan is a stingy person. Is there any harm to me if I spend on his dependants from his property without his permission ? The Prophet ﷺ replied: There is no harm to you if you spend according to the custom. (Using translation from Abū Dāʾūd 3533)  

جَاءَتْ هِنْدٌ إِلَى النَّبِيِّ ﷺ فَقَالَتْ يَا رَسُولَ اللهِ إِنَّ أَبَا سُفْيَانَ رَجُلٌ مُمْسِكٌ فَهَلْ عَلَيَّ جُنَاحٌ أَنْ أَنْفَقَ عَلَى عِيَالِهِ مِنْ مَالِهِ بِغَيْرِ إِذْنِهِ فَقَالَ النَّبِيُّ ﷺ «لَا حَرَجَ عَلَيْكِ أَنْ تُنْفِقِي عَلَيْهِمْ بِالْمَعْرُوفِ»  

Hind bint ʿUtba said, "O Messenger of Allah ﷺ! Abu Sufyan is a miser and he does not give me what is sufficient for me and my children. Can I take of his property without his knowledge?" The Prophet ﷺ said, "Take what is sufficient for you and your children, and the amount should be just and reasonable. (Using translation from Bukhārī 5364)   

يَا رَسُولَ اللهِ إِنَّ أَبَا سُفْيَانَ رَجُلٌ شَحِيحٌ وَلَيْسَ يُعْطِينِي مَا يَكْفِينِي وَوَلَدِي إِلَّا مَا أَخَذْتُ مِنْهُ وَهُوَ لَا يَعْلَمُ قَالَ «خُذِي مَا يَكْفِيكِ وَوَلَدَكِ بِالْمَعْرُوفِ»