​The Lawful

It is unlawful for anyone to use the property of his brother except by his consent.

رسولُ اللَّهِ صلى اللَّه عليه وآله :  لا يَحِلُّ لامرئٍ مِن مالِ أخيهِ شي‏ءٌ إلّا بطِيبِ نَفْسٍ مِنهُ‏  . كنز العمّال : 30345 .

 The Prophet (SAWA) said, 'It is unlawful for anyone to use the property of his brother except by his consent.' Kanz al-Ummal, no. 30345