9:11At-Tawba

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.

A Muslim is the brother of a fellow-Muslim. He should neither commit oppression upon him nor ruin him, and he who meets the need of a brot'ier, Allah would meet big needs, and he who relieved a Muslim from hardship Allah would relieve him from the hardships to which he would be put on the Day of Resurrection, and he who did not expose (the follies of a Muslim) Allah would conceal his follies on the Day of Resurrection.

A Muslim is a Muslim’s brother: he does not wrong him or abandon him. If anyone cares for his brother’s need, Allah will care for his need ; if anyone removes a Muslim’s anxiety, Allah will remove from him, on account of it, one of the anxieties of the Day of resurrection ; and if anyone conceals a Muslim’s fault, Allah will conceal his fault on the Day of resurrection.