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Making du'a that Allaah :swt: sends His Salat and Salam upon the Prophet :saws: is a virtuous action and a reason that Allaah :swt: forgives sins and takes away worries:
Ubayy bin Ka'b (May Allah be pleased with him) reported:
When one- third of the night would pass, Messenger of Allah :saws: would get up and call out, "O people, remember Allah. The Rajifah (i.e., the first Blowing of the Trumpet which will shake the whole universe and thus cause all life to cease) has come, followed by Ar-Radifah (i.e., the second Blowing of the Trumpet which will restore life and thus mark the Resurrection Day). Death has approached with all that it comprises. Death has approached with all that it comprises." I said: "O Messenger of Allah :saws:, I frequently invoke Allah to elevate your rank. How much of my supplications should I devote to you?" He said, "You may devote as much as you wish." When I suggested a quarter, he said, "Do whatever you wish, but it will be better for you if you increase it." I suggested half, and he said, "Do whatever you wish, but it will be better for you if you increase." I suggested two- thirds, and he said, "Do whatever you wish but it will be better for you if you increase it." I said, "Shall I devote all my supplications invoking Allah to elevate your rank?" He said, "Then you will be freed from your worries and your sins will be forgiven."
Arabic/English book reference : Book 1, Hadith 580
However, we must be careful of using a particular form of durood and believing that we have to repeat it a certain number of times, without there being any evidence for this. In general, durood is a form of dhikr and you can say it as much as you like. And the best forms are those that have been taught to us in the Sunnah:
Originally Posted by Insaanah
At times of calamity, we have to try to humble ourselves before Allaah :swt: and seek His forgiveness as much as possible.
May Allaah :swt: ease your troubles, Aameen.