Musannaf Ibn Abi Shaybah

Hazrat Khalid bin Waleed (may Allah be pleased with him) says that there is no night on the face of the earth more beloved to me, in which I receive the good news of a son and a bride is sent to me whom I love, than that night which is full of hardship, which I spend with a group of Mujahideen, and in the morning I lead them to attack the enemy. Therefore, jihad is obligatory upon you.