The Messenger of Allah ﷺ said, "There is no Muslim on earth who supplicates Allah with any supplication except that Allah grants him what he asked for, or wards off from him an equivalent harm, so long as he does not supplicate for something sinful or for the severing of family ties."A man from the gathering said, "Then we will ask abundantly."He replied, "Allah has even more to give."
أن رسول الله ﷺ قال: ما على الأرض مسلم يدعو الله بدعوة إلا آتاه الله إياها أو صرف عنه من السوء مثلها ما لم يدع بمأثم أو قطيعة رحم. فقال رجل من القوم: إذا نكثر. قال الله أكثر.
Tirmidhi (3573) and Abdullah bin Ahmad in his additions to the Musnad (22785) both narrated it via Muhammad bin Yusuf, from Ibn Thawban, from his father, from Makhul, from Jubayr bin Nufayr, that Ubada bin Samit related it to them, and so he mentioned it.Tirmidhi said, "This is a hasan sahih hadith, gharib from this angle, and Ibn Thawban is Abdul-Rahman bin Thabit bin Thawban, the devout worshipper from Sham."Its chain of transmission is hasan because of Abdul-Rahman bin Thabit bin Thawban, for there is disagreement about him, though his hadith is hasan, and the rest of the narrators are reliable. His father is Thabit bin Thawban Ansi, from Sham, and Muhammad bin Yusuf is Firyabi.