The Prophet ﷺ congratulated a newly married person with a du'a for barakah. Say it to the couple, and ask Allah (SWT) to make their spouses and children a comfort to the eyes.
Baraka-llahu laka, wa baraka 'alayka, wa jama'a baynakuma fi khayr.
“May Allah bless you, send blessings upon you, and bring you both together in goodness.”
Abu Hurayrah reported that this is what the Prophet ﷺ said when he congratulated someone on their marriage. At-Tirmidhi graded it hasan sahih.
Rabbana atina fi-d-dunya hasanah, wa fi-l-akhirati hasanah, wa qina 'adhaba-n-nar.
“Our Lord, give us in this world good and in the Hereafter good, and protect us from the punishment of the Fire.”
A short, complete prayer asking Allah (SWT) for every kind of genuine good in this life, lasting good in the Hereafter, and protection from the Fire.
Rabbana hab lana min azwajina wa dhurriyyatina qurrata a'yun, wa-j'alna li-l-muttaqina imama.
“Our Lord, grant us from our spouses and offspring the comfort of our eyes, and make us leaders for the God-conscious.”
A Qur'anic prayer for spouses and children who bring deep joy through faith and good character, and for a family whose example helps others become mindful of Allah (SWT).
Idha tazawwaja ahadukumu-mra'atan, aw idhashtara khadiman fal-yaqul: Allahumma inni as'aluka khayraha wa khayra ma jabaltaha 'alayh, wa a'udhu bika min sharriha wa sharri ma jabaltaha 'alayh. Wa idhashtara ba'iran fal-ya'khudh bi-dhirwati sanamihi wal-yaqul mithla dhalik.
“When one of you marries a woman, or takes on a servant, let him say: O Allah, I ask You for her good and the good of the nature You have given her, and I seek refuge in You from her harm and the harm of the nature You have given her. And when he buys a camel, let him take hold of the top of its hump and say the same.”
A du'a for a new beginning: asking for the good in what Allah (SWT) has brought into your life and protection from any harm in it.