Sayyiduna Abu Hurayrah (may Allah be pleased with him) said: The Messenger of Allah (peace and blessings be upon him) ordered an expedition (sariyyah) to set out. They said: O Messenger of Allah (peace and blessings be upon him)! Should we leave at night or wait until morning? He (peace and blessings be upon him) said: "Would you not love to spend the night in the gardens of Paradise?"
Hadith Referenceالسنن الكبرى للبيهقي / كتاب السير / 18492