It is narrated from Mu'adh bin Jabal (may Allah be pleased with him) that the Prophet (peace and blessings of Allah be upon him) said: "Whoever sincerely prays to be killed in the way of Allah, Allah will grant him the reward of martyrdom." Imam Tirmidhi says: This hadith is Hasan Sahih.

It is narrated from Sahl bin Hunaif (may Allah be pleased with him) that the Prophet Muhammad (peace and blessings of Allah be upon him) said: "Whoever sincerely asks Allah for martyrdom, Allah will grant him the rank of the martyrs even if he dies on his bed." 1. Imam Tirmidhi says:
1- The hadith of Sahl bin Hunaif is Hasan Gharib; we know it only from the narration of Abdur Rahman bin Shuraih. This hadith has also been narrated from Abdur Rahman bin Shuraih by Abdullah bin Salih. The kunyah of Abdur Rahman bin Shuraih is Abu Shuraih, and he is an Iskandarani (resident of Alexandria).
2- In this chapter, there is also a narration from Mu'adh bin Jabal (may Allah be pleased with him).