There is not a single created thing from The Heavens to The earth but it prostrate to ALLAAH .
(1) Sending Dawrood upon prophet (peace be upon him) is command of ALLAAH that should be done
Surah Al-Ahzab, Verse 56:::Allah sends His Salat (Graces, Honours, Blessings, Mercy, etc.) on the Prophet (Muhammad SAW) and also His angels too (ask Allah to bless and forgive him). O you who believe! Send your Salat on (ask Allah to bless) him (Muhammad SAW), and (you should) greet (salute) him with the Islamic way of greeting (salutation i.e. AsSalamu ‘Alaikum).(English – Mohsin Khan)
But sending Dawrood on Friday is more virtuous than other days because
It was narrated from Aws ibn Aws that the Prophet (peace and blessings of Allaah be upon him) said: “The best of your days is Friday. On that day Adam (peace be upon him) was created; on that day he died; on that day the Trumpet will be blown and on that day all of creation will swoon. So send a great deal of blessings upon me, for your blessings will be shown to me.” They said, “O Messenger of Allaah, how will our blessings upon you be shown to you when you have turned to dust?” He said, “Allaah has forbidden the earth to consume the bodies of the Prophets, peace be upon them.” (Narrated by Abu Dawood, 1047)
(2)Praying Fajr in congregation on Fridays is the best prayer that the Muslim can pray during the week.
It was narrated that Ibn ‘Umar said: The Messenger (peace and blessings of Allaah be upon him) said: “The best prayer before Allaah is Fajr prayer on Friday in congregation.” (Narrated by al-Bayhaqi in Shu’ab al-Eemaan; classed as saheeh by al-Albaani in Saheeh al-Jaami’, 1119)
(3) 7 + 3 = 10
It was narrated from Abu Hurayrah that the Prophet (peace and blessings of Allaah be upon him) said: “Whoever does ghusl then comes to Jumu’ah, and prays as much as Allaah decrees for him, then listens attentively until the khutbah is over, then prays with him (the imam), will be forgiven for (his sins) between that and the next Jumu’ah and three more days.”(Muslim 857)
(4) If a person walks to Jumu’ah prayer, for every step he will have the reward of fasting and praying qiyaam for one year.
It was narrated from Aws ibn Aws al-Thaqafi that the Messenger of Allaah (peace and blessings of Allaah be upon him) said: “Whoever does ghusl on Friday and causes (his wife) to do ghusl, and sets out early, and comes close to the imam and listens and keeps quiet, for every step he takes he will have the reward of fasting and praying qiyaam for one year.” (At-Tirmidhi 496)