Encouragement is mentioned in the Quran in these verses:
[5:108] This is more apt to encourage an honest testimony on their part, fearing that their oath may be disregarded like that of the previous witnesses. You shall observe God and listen. God does not guide the wicked.
[7:183] I will even encourage them; My scheming is formidable.
[9:103] Take from their money a charity to purify them and sanctify them. And encourage them, for your encouragement reassures them. God is Hearer, Omniscient.
[24:32] You shall encourage those of you who are single to get married. They may marry the righteous among your male and female servants, if they are poor. God will enrich them from His grace. God is Bounteous, Knower.
To learn more, read the Quran in English.
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