Frequent Dhikr during the first ten days of Dhul-Hijjah Ibn 'Umar (رضي الله عنه) reported that the Prophet (ﷺ) said: “No days are greater to Allah, nor are good deeds more beloved by Him during them, than the Ten Days. So increase tasbih (Subhan'Allah), tahmid (Alhamdulillah), takbir (Allahu Akbar), and tahlil (La ilaha illallah) during these days.” ----------------------------------- [Recorded by Ahmad and at-Tahawi. Verified to be hasan by al-Albani (Irwa' ul Ghalil no. 890)]