الصادق

In a sentence

• كان أحمد الصادقَ في كلماته.

  Ahmed was truthful in his words.

  In this sentence, 'الصادق' acts as an adjective describing Ahmed, giving the meaning of being truthful or honest.

• الإخلاص يجعل الإنسان الصادق محبوباً.

  Sincerity makes the truthful person beloved.

  Here, 'الصادق' is used as an adjective to describe a person characterized by truthfulness, attributing the quality of honesty.

• تعلمت من أستاذي أن الصدق هو مفتاح النجاح، ولهذا يجب أن أكون من الصادقين.

  I learned from my teacher that honesty is the key to success, so I must be among the truthful.

  In this context, 'الصادقين' is the plural form of 'الصادق,' referring collectively to people who embody truthfulness.