Silsilat al-Ahadith al-Sahihah

It is narrated from Sayyiduna Abu Hurairah (may Allah be pleased with him) that the Noble Prophet (peace and blessings of Allah be upon him) said: "Whoever fears (the enemy's attack) and sets out in the early part of the night, and (the reality is that) whoever sets out in the early part of the night reaches his destination. Listen carefully, the merchandise of Allah is precious. Beware! The merchandise of Allah is Paradise."