مَن ظَنَّ بِاللَهِ خَيراً جادَ مُبتَدِئاً

وَالبُخلُ مِن سوءِ ظَنِّ المَرءِ بِاللَهِ

Whoever thinks good of Allah, He will be generous from the start

And stinginess comes from the person's ill thoughts of Allah