{ Do not at all deem those who have been killed in the cause of Allah to be dead, but rather alive with their Lord, bestowed with favor; joyful in what Allah has brought them of His abundance, rejoicing over those behind them who have not yet met up with them, that no fear is upon them nor are they sad; rejoicing over grace from Allah and abundance, and that Allah does not squander the reward of the believers } Al ‘Imran 169-171

{ Rejoicing } : they delight in the good news. … This verse is evidence that man is not a framework perceptible by the senses, but rather he is an essence aware of himself, who does not cease to exist upon the destruction of the body; and his consciousness, feeling of pain, and feeling of pleasure do not depend on this. The word of the Most High upholds this regarding the house of Pharaoh: { The fire – they are exposed to it … } and the rest of the verse [Al-Ghafir 46], as well as what Ibn ‘Abbas (may Allah be pleased with them both) related, that He (prayers and peace be upon him) said: The spirits of the martyrs are in the bosoms of green birds, that go down to the rivers of Jannah and eat of its fruits, and retreat to lamps hanging in the shade of the Throne. Whoever denies this, and sees the spirit as only a wind or as something fleeting, would say that they will be alive on resurrection day. However they ascribed it forthwith in order to be certain of it, and drew near to them as alive either in memory or in faith. In this there is an exhortation to jihad and an arousal of desire for martyrdom, a message towards greater obedience, bestowing of praise on those who desire for their brothers the favour that has been bestowed on them, and to the Believers good tidings of success.