Narrated Anas bin Malik:
The Prophet (ﷺ) said, "Nobody who enters Paradise likes to go back to the world even if he got everything on the earth, except a Mujahid who wishes to return to the world so that he may be martyred ten times because of the dignity he receives (from Allah)."
وَقَالَ عُمَرُ لِلنَّبِيِّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ أَلَيْسَ قَتْلاَنَا فِي الْجَنَّةِ وَقَتْلاَهُمْ فِي النَّارِ قَالَ: «بَلَى».
Narrated `Abdullah bin Abi `Aufa:
Allah's Messenger (ﷺ) said, "Know that Paradise is under the shades of swords."
Narrated Abu Huraira:
Allah's Messenger (ﷺ) said, "Once Solomon, son of David said, '(By Allah) Tonight I will have sexual intercourse with one hundred (or ninety-nine) women each of whom will give birth to a knight who will fight in Allah's Cause.' On that a (i.e. if Allah wills) but he did not say, 'Allah willing.' Therefore only one of those women conceived and gave birth to a half-man. By Him in Whose Hands Muhammad's life is, if he had said, "Allah willing', (he would have begotten sons) all of whom would have been knights striving in Allah's Cause."