'Umar (may Allah be pleased with him) reports that once a needy person came to ask Messenger of Allah ﷺ for his need. Messenger of Allah ﷺ replied:
"I do not have anything at present. Go and purchase something on my behalf. When something arrives I will pay for it". 'Umar (may Allah be pleased with him) said: "O Messenger of Allah, whatever you possessed you have already given away. Allah Ta'aala did not make you responsible for that which is not in your means". Messenger of Allah ﷺ felt annoyed at this saying of 'Umar (may Allah be pleased with him). Thereupon a person from among, the Ansaar said: "O Rasul, of Allah, spend whatever you wish, and do not fear any lessening from the Lord of the 'Arsh (Throne)". (That Great Deity that is the Lord of the 'Arsh, nothing will decrease in His Bounties by giving you). Messenger of Allah ﷺ smiled and the happiness could be seen on his mubaarak face due to the saying of the Ansaari. Messenger of Allah ﷺ than said: "Allah Ta'aala has commanded me to do this".

حَدَّثَنَا هَارُونُ بْنُ مُوسَى بْنِ أَبِي عَلْقَمَةَ الْمَدِينِيُّ، قَالَ: حَدَّثَنِي أَبِي، عَنْ هِشَامِ بْنِ سَعْدٍ، عَنْ زَيْدِ بْنِ أَسْلَمَ، عَنْ أَبِيهِ، عَنْ عُمَرَ بْنِ الْخَطَّابِ، أَنَّ رَجُلا جَاءَ إِلَى النَّبِيِّ ﷺ، فَسَأَلَهُ أَنْ يُعْطِيَهُ، فَقَالَ النَّبِيُّ ﷺ: مَا عِنْدِي شَيْءٌ، وَلَكِنِ ابْتَعْ عَلَيَّ، فَإِذَا جَاءَنِي شَيْءٌ قَضَيْتُهُ فَقَالَ عُمَرُ: يَا رَسُولَ اللهِ، قَدْ أَعْطَيْتُهُ فَمَّا كَلَّفَكَ اللَّهُ مَا لا تَقْدِرُ عَلَيْهِ، فَكَرِهَ النَّبِيُّ ﷺ قَوْلَ عُمَرَ، فَقَالَ رَجُلٌ مِنَ الأَنْصَارِ: يَا رَسُولَ اللهِ، أَنْفِقْ وَلا تَخَفْ مِنْ ذِي الْعَرْشِ إِقْلالا، فَتَبَسَّمَ رَسُولُ اللهِ ﷺ وَعُرِفَ فِي وَجْهِهِ الْبِشْرَ لِقَوْلِ الأَنْصَارِيِّ، ثُمَّ قَالَ: بِهَذَا أُمِرْتُ.