24:56An-Noor

"You are going to some people from among the people of the Book. Call them to bear witness that there is none worthy of worship except Allah and that I am the Messenger of Allah. If they obey you in that, then teach them that Allah has enjoined upon them five prayers every day and night. If they obey you in that, then teach them that Allah has enjoined upon them Sadaqah (Zakah) from their wealth, to be taken from their rich and given to their poor. If they obey you in that, then do not touch the most precious of their wealth, and fear the supplication of the one who has been wronged, for there is no barrier between it and Allah, the Mighty and Sublime."

Verily you would reach a community of the people of the Book, the very first thing to which you should call them is the worship of Allah, may His Glory be Magnificent, and when they become fully aware of Allah, instruct them that He has enjoined five prayers on them during the day and the night, and when they begin observing it, then instruct them that verily Allah has made Zakat obligatory for them which would be collected from the wealthy amongst them and distributed to their needy ones, and when they submit to it, then collect it from them and avoid (the temptation) of selecting the best (items) of their riches.

When Allah's Messenger (ﷺ) (p.b.u.h) sent Mu`adh to Yemen, he said (to him), "YOU are going to people of a (Divine) Book. First of all invite them to worship Allah (alone) and when they come to know Allah, inform them that Allah has enjoined on them, five prayers in every day and night; and if they start offering these prayers, inform them that Allah has enjoined on them, the Zakat. And it is to be taken from the rich amongst them and given to the poor amongst them; and if they obey you in that, take Zakat from them and avoid (don't take) the best property of the people as Zakat."

Direct me to a deed which draws me near to Paradise and takes me away from the Fire (of Hell). Upon this he (the Holy Prophet) said: You worship Allah and never associate anything with Him, establish prayer, and pay Zakat, and do good to your kin. When he turned his back, the Messenger of Allah (ﷺ) remarked: If he adheres to what he has been ordered to do, he would enter Paradise.

Messenger of Allah, direct me to a deed by which I may be entitled to enter Paradise. Upon this he (the Holy Prophet) remarked: You worship Allah and never associate anything with Him, establish the obligatory prayer, and pay the Zakat which is incumbent upon you, and observe the fast of Ramadan. He (the bedouin) said: By Him in Whose hand is my life, I will never add anything to it, nor will I diminish anything from it. When he (the bedouin) turned his back, the Prophet (ﷺ) said: He who is pleased to see a man from the dwellers of Paradise should catch a glimpse of him.