While we were sitting with the Messenger of Allah ﷺ a man brought him some gold equal in weight to an egg, and said: Messenger of Allah, I have got this from a mine; take it; it is sadaqah. I have no more than this. The Messenger of Allah ﷺ turned his attention from him. Then he came to him from his right side and repeated the same words. But he (the Prophet) turned his attention from him. He then came to him from his left side and repeated the same words. But he (again) turned his attention from him. He then came to him from behind. The Messenger of Allah ﷺ took it and threw it away. Had it hit him, it would have hurt him or wounded him. The Messenger of Allah ﷺ said: One of you brings all that he possesses and says: This is sadaqah. Then he sits down and spreads his hand before the people. The best sadaqah is that which leaves a competence.  

كُنَّا عِنْدَ رَسُولِ اللَّهِ ﷺ إِذْ جَاءَ رَجُلٌ بِمِثْلِ بَيْضَةٍ مِنْ ذَهَبٍ فَقَالَ يَا رَسُولَ اللَّهِ أَصَبْتُ هَذِهِ مِنْ مَعْدِنٍ فَخُذْهَا فَهِيَ صَدَقَةٌ مَا أَمْلِكُ غَيْرَهَا فَأَعْرَضَ عَنْهُ رَسُولُ اللَّهِ ﷺ ثُمَّ أَتَاهُ مِنْ قِبَلِ رُكْنِهِ الأَيْمَنِ فَقَالَ مِثْلَ ذَلِكَ فَأَعْرَضَ عَنْهُ ثُمَّ أَتَاهُ مِنْ قِبَلِ رُكْنِهِ الأَيْسَرِ فَأَعْرَضَ عَنْهُ رَسُولُ اللَّهِ ﷺ ثُمَّ أَتَاهُ مِنْ خَلْفِهِ فَأَخَذَهَا رَسُولُ اللَّهِ ﷺ فَحَذَفَهُ بِهَا فَلَوْ أَصَابَتْهُ لأَوْجَعَتْهُ أَوْ لَعَقَرَتْهُ فَقَالَ رَسُولُ اللَّهِ ﷺ يَأْتِي أَحَدُكُمْ بِمَا يَمْلِكُ فَيَقُولُ هَذِهِ صَدَقَةٌ ثُمَّ يَقْعُدُ يَسْتَكِفُّ النَّاسَ خَيْرُ الصَّدَقَةِ مَا كَانَ عَنْ ظَهْرِ غِنًى  

The above mentioned tradition has also been transmitted by Ibn Ishaq through a different chain of narrators to the same effect. This version adds "have your property with you from us. We have no need of it."  

عَنِ ابْنِ إِسْحَاقَ بِإِسْنَادِهِ وَمَعْنَاهُ زَادَ خُذْ عَنَّا مَالَكَ لاَ حَاجَةَ لَنَا بِهِ  

A man entered the mosque. The Prophet ﷺ commanded the people to throw their clothes as sadaqah. Thereupon they threw their clothes (as sadaqah). He then asked him to take two clothes from them. He reprimanded him and said: Take your clothe.  

سَمِعَ أَبَا سَعِيدٍ الْخُدْرِيَّ يَقُولُ دَخَلَ رَجُلٌ الْمَسْجِدَ فَأَمَرَ النَّبِيُّ ﷺ النَّاسَ أَنْ يَطْرَحُوا ثِيَابًا فَطَرَحُوا فَأَمَرَ لَهُ مِنْهَا بِثَوْبَيْنِ ثُمَّ حَثَّ عَلَى الصَّدَقَةِ فَجَاءَ فَطَرَحَ أَحَدَ الثَّوْبَيْنِ فَصَاحَ بِهِ وَقَالَ خُذْ ثَوْبَكَ  

Abu Hurairah reported the Messenger of Allah ﷺ as saying The best sadaqah is that which leaves a competence ; and begin with those for whom you are responsible.  

قَالَ رَسُولُ اللَّهِ ﷺ إِنَّ خَيْرَ الصَّدَقَةِ مَا تَرَكَ غِنًى أَوْ تُصُدِّقَ بِهِ عَنْ ظَهْرِ غِنًى وَابْدَأْ بِمَنْ تَعُولُ