The Messenger of Allah ﷺ said, "The hand of Allah is full, and no spending diminishes it. He gives generously, pouring forth night and day."He continued, "Have you considered all that He has spent since He created the heavens and the earth? It has not diminished what is in His hand."He also said, "His Throne was upon the water, and in His other hand is the Scale, lowering and raising."
أن رسول الله ﷺ قال: يد الله ملأى لا يغيظها نفقة سحاء الليل والنهار. وقال: أرأيتم ما أنفق منذ خلق السماوات والأرض، فإنه لم يغض ما في يده. وقال: وكان عرشه على الماء، وبيده الأخرى الميزان، يخفض ويرفع.
Bukhari narrated it in the Book of Tawhid (7411), from Abu Yaman, who said, Shuayb informed us, Abu Zinad related to us, from Araj, from Abu Hurairah, and he mentioned the hadith. Muslim narrated it in the Book of Zakat (993) through two routes from Sufyan bin Uyayna, from Abu Zinad, from Abu Hurairah, and in it, "Allah said, 'O Ibn Adam, spend and I will spend on you.'" And he said, "The right hand of Allah is full, overflowing, and nothing diminishes it, night and day." And through the route of Hammam bin Munabbih, from Abu Hurairah, in it, "Allah said to me, 'Spend and I will spend on you.'" And the Messenger of Allah ﷺ said, "The right hand of Allah is full, nothing diminishes it, overflowing, night and day. Have you considered what He has spent since He created the heavens and the earth? Yet that has not diminished what is in His right hand." He said, "And His throne is upon the water, and in His other hand is the grasp, He raises and He lowers."Bukhari also narrated it through this route (7419).As for his saying "sahha", with the long vowel, on the pattern of "faalaa", Nawawi said, "This word has come in two forms. One of them is 'sahhan', with nunation, as a verbal noun, and this is the more correct and more well known. The second is 'sahhaa', with the long vowel."And Ibn Athir said in Nihayah, "Sahhaa means constantly pouring forth and flowing in giving. One says, 'sahha, yasihhu, sahhan', so it is 'sahh'."