وعنه أن النبي صلى الله عليه وآله وسلم كان إذا رفأ إنسانا ، إذا تزوج ، قال: « بارك الله لك ، وبارك عليك ، وجمع بينكما في خير ». رواه أحمد والأربعة ، وصححه الترمذي وابن خزيمة وابن حبان.
Narrated [Abu Hurairah (RA)]: When the Prophet (ﷺ) congratulated a man on his marriage he would say, "Allah bless for you (your spouse), grant you blessing, and join you together in goodness." [Reported by Ahmad and al-Arba'a. at-Tirmidhi, Ibn Khuzaimah and Ibn Hibban graded it Sahih (authentic)].
Related hadith on this topic
Explanation & Benefits
Shaykh Umar Farooq Saeedi
Benefits and Issues:
On such occasions of happiness, one should offer pure and Sunnah supplications as congratulations, which encompass all apparent and hidden meanings of affection, love, and increase.
Source: Sunan Abu Dawood – Commentary by Shaykh Umar Farooq Saeedi, Page: 2130