Tirmidhi

Abu Hurairah (may Allah be pleased with him) reports that it was asked: O Messenger of Allah! Which deed is equal to Jihad in reward and merit? He replied: "You do not have the ability to do it." The companions repeated the same question before you two or three times, and each time you said: "You do not have the ability to do it." The third time you said: "The example of the one who strives in the path of Allah is like that of a person who fasts and prays continuously, not ceasing from prayer and fasting, until the warrior in the path of Allah returns." .

Imam Tirmidhi says:
1- This hadith is Hasan Sahih (good and authentic),
2- This hadith has come through several chains from Abu Hurairah in a marfu' (attributed to the Prophet) manner,
3- In this chapter, hadiths have also been narrated from Shifa, Abdullah bin Hubshi, Abu Musa, Abu Sa'id, Umm Malik Bahziyah, and Anas (may Allah be pleased with them).

Anas (may Allah be pleased with him) reports that the Messenger of Allah (peace and blessings be upon him) said: "Allah, the Mighty and Majestic, says: I am the guarantor of the one who strives in My path; if I take his soul, I will make him an inheritor of Paradise, and if I return him (to his home), I will return him with reward or with spoils of war." © Imam Tirmidhi says:
This hadith is sahih ghareeb through this chain.