Qur'an 58:12

يَـٰٓأَيُّهَا ٱلَّذِينَ ءَامَنُوٓا۟ إِذَا نَـٰجَيْتُمُ ٱلرَّسُولَ فَقَدِّمُوا۟ بَيْنَ يَدَىْ نَجْوَىٰكُمْ صَدَقَةً ۚ ذَٰلِكَ خَيْرٌ لَّكُمْ وَأَطْهَرُ ۚ فَإِن لَّمْ تَجِدُوا۟ فَإِنَّ ٱللَّهَ غَفُورٌ رَّحِيمٌ

O ye who believe! When ye hold conference with the messenger, offer an alms before your conference. That is better and purer for you. But if ye cannot find (the wherewithal) then lo! Allah is Forgiving, Merciful.