وَمِنَ ٱلْأَعْرَابِ مَن يُؤْمِنُ بِٱللَّهِ وَٱلْيَوْمِ ٱلْـَٔاخِرِ وَيَتَّخِذُ مَا يُنفِقُ قُرُبَـٰتٍ عِندَ ٱللَّهِ وَصَلَوَٰتِ ٱلرَّسُولِ ۚ أَلَآ إِنَّهَا قُرْبَةٌ لَّهُمْ ۚ سَيُدْخِلُهُمُ ٱللَّهُ فِى رَحْمَتِهِۦٓ ۗ إِنَّ ٱللَّهَ غَفُورٌ رَّحِيمٌ

But among the bedouins are some who believe in Allāh and the Last Day and consider what they spend as means of nearness to Allāh and of [obtaining] invocations of the Messenger. Unquestionably, it is a means of nearness for them. Allāh will admit them to His mercy. Indeed, Allāh is Forgiving and Merciful.

At-Tawbah 99

تَتَجَافَىٰ جُنُوبُهُمْ عَنِ ٱلْمَضَاجِعِ يَدْعُونَ رَبَّهُمْ خَوْفًا وَطَمَعًا وَمِمَّا رَزَقْنَـٰهُمْ يُنفِقُونَ

Their sides part [i.e., they arise] from [their] beds; they supplicate their Lord in fear and aspiration, and from what We have provided them, they spend.1

As-Sajdah 16