Sahih al-Bukhari, Hadith 1124 ⓘ
Narrated Jundab: The Prophet became sick and did not get up (for Tahajjud prayer) for a night or two.
حَدَّثَنَا أَبُو نُعَيْمٍ، قَالَ حَدَّثَنَا سُفْيَانُ، عَنِ الأَسْوَدِ، قَالَ سَمِعْتُ جُنْدَبًا، يَقُولُ اشْتَكَى النَّبِيُّ صلى الله عليه وسلم فَلَمْ يَقُمْ لَيْلَةً أَوْ لَيْلَتَيْنِ.
also referenced under: Book 19, Hadith 4 (In-Book) & Volume 2, Book 21, Hadith 224 (USC-MSA)