Al-Kāfi

Hadith 4
spending
4ـ عِدَّةٌ مِنْ أَصْحَابِنَا عَنْ سَهْلِ بْنِ زِيَادٍ عَنِ النَّوْفَلِيِّ عَنِ السَّكُونِيِّ عَنْ أَبِي عَبْدِ الله (عَلَيْهِ السَّلاَم) قَالَ قَالَ رَسُولُ الله (صلَّى اللهُ عَلَيْهِ وَآلِه) مَنْ صَدَّقَ بِالْخَلَفِ جَادَ بِالْعَطِيَّةِ.
4. A number of our people have narrated from Sahl ibn Ziyad from al-Nawfaliy from al-Sakuniy who has said the following: “Abu ‘Abd Allah (a.s.), has said, that the Messenger of Allah (s.a.), has said, ‘One who is certain of (good) consequences, he strives to make it a good gift.’”
Source: Shaykh Muḥammad b. Yaʿqūb al-Kulaynī