´It was narrated from `Aqil bin Abu Talib:` that he married a woman from Banu Jusham, and they said: “May you live in harmony and have many sons.” He said: “Do not say that, rather say what the Messenger of Allah said: 'Allahumma barik lahum wa barik `alaihim (O Allah, bless them and bestow blessings upon them).' ”
Explanation & Benefits
Maulana Ataullah Sajid
Benefits and Issues:
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It is Sunnah to congratulate the bride and groom on the occasion of marriage and to supplicate goodness for them.
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The best way to offer congratulations and supplication for goodness is to use those blessed words which were uttered by the noble tongue of the Prophet (sallallahu alayhi wa sallam).
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Even if non-Islamic customs appear outwardly harmless and no fault is perceived in them, it is still appropriate to abandon them and adopt Islamic customs, so that distinction from non-Muslims remains. Therefore, it is extremely necessary to avoid such customs and traditions which are contrary to Islamic etiquette of social conduct or are connected to non-Islamic beliefs.
Source: Commentary on Sunan Ibn Mājah by Mawlānā ‘Atā’ullāh Sājid, Page: 1906