What is the supplication (du'a) of Anas ibn Malik through which supplications are answered, Allah willing, and is it specific to marriage?

The supplication which, if a Muslim makes it, will be answered is the supplication: "O Allah, there is no god but You, the Bestower, the Originator of the heavens and the earth, full of Majesty and Honor." This was narrated by Anas ibn Malik from the Prophet, peace and blessings be upon him, and it was reported that the man who made this supplication was the Companion Zayd ibn As-Sāmit. A Muslim may make this supplication for marriage or for other matters of this world and the Hereafter. As for the widespread hadith (definition) narrated from Anas ibn Malik, known as the supplication of caution (duʿāʾ al-iḥtirās), it is very weak and not authentic.