Riyad as-Salihin: The Book of Virtues – Hadith No. 515 — Aishah (May Allah be pleased with her) reported: The Messenger of Allah (ﷺ)… (Hadith No. 515)

'Aishah (May Allah be pleased with her) reported: The Messenger of Allah (ﷺ) used to strive more in worship during Ramadan than he strove in any other time of the year; and he would devote himself more (in the worship of Allah) in the last ten nights of Ramadan than he strove in earlier part of the month..

Explanation:

Reference: Riyad as-Salihin, The Book of Virtues, Hadith No. 515