Glad tidings of martyrdom
There is a Hadith in Sahih Bukhari:
Translation: It is narrated on the authority of Hadhrat Anas Bin Malik (May Allah be well pleased with him), he said: The Holy Prophet (Sallallahu alaihi wa sallam), Hadhrat Abu Bakr, Hadhrat Umar and Hadhrat Uthman (May Allah be well pleased with them) graced the mountain of Uhud with their presence. Out of happiness, the mountain started swaying. The Holy Prophet (Sallallahu alaihi wa sallam) tapped it with His foot and said: O Uhud! Steady! The Prophet (Sallallahu alaihi wa sallam), 1 Faithful (Siddiq) and 2 martyrs (Shaheed) are on you. (Sahih Bukhari, Hadith No. 3686)
Frequently, Hadhrat ‘Umar (May Allah be well pleased with him) would supplicate for dying in Madina and for being martyred, as given in this Hadith of Sahih Bukhari:
Translation: It is narrated on the authority of Hadhrat Zaid bin Aslam who narrates on the authority of his father who heard Hadhrat ‘Umar (May Allah be well pleased with him) say: O Allah! You grant martyrdom in Your path and give me death in the land of Your Beloved. (Sahih Bukhari, Hadith No. 1890)