That the Messenger of Allah (ﷺ) said: "There are three for whom it is a right upon Allah to help him: The Mujahid in the cause of Allah, the Mukatab who intends to fulfill (the Kitabah), and the one getting married who intends chastity."

This Hadith is Hasan.
Jami` at-Tirmidhi Book 22, Hadith 38
← Previous Hadith That the Prophet (ﷺ) said: "Whoever asks Allah to be killed in His cause sincerely from his heart, Allah shall give him the reward of martyrdom.

This Hadith is Hasan Sahih.

Jami` at-Tirmidhi Book 22, Hadith 37 Next Hadith → That the Messenger of Allah (ﷺ) said: "None is wounded in Allah's cause - and Allah knows better about who has been injured in His cause - except that he will come on the Day of Resurrection with his wound the color of blood but its scent will be the scent of musk."

This Hadith is Hasan Sahih. It has been reported through other routes from the Prophet (ﷺ).

Jami` at-Tirmidhi Book 22, Hadith 39