Qurrah bin Khalid (may Allah have mercy on him) says: We waited for al-Hasan. He was late, then he came. Anas (may Allah be pleased with him) says: One night we waited for the Prophet (peace and blessings be upon him) until about half the night had passed. He (peace and blessings be upon him) was informed of this, so he (peace and blessings be upon him) came and led the prayer, then addressed us. He (peace and blessings be upon him) said: "The people prayed and went to sleep, and you remained in prayer for as long as you were waiting for the prayer." Al-Hasan (may Allah have mercy on him) says: People remain in goodness for as long as they wait for goodness.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الصلاة / 4986