And he (the Prophet) ﷺ would make a lot of Du'ā in the (first) 10 days of Dhul-Ḥijjah and he would command with the increase of (saying) Lā ilāha ill-Allāh, Allāhu Akbar and Alhamdulillāh. وَكَانَ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ يُكْثِرُ الدُّعَاءَ فِي عَشْرِ ذِي الْحِجَّةِ، وَيَأْمُرُ فِيهِ بِالْإِكْثَارِ مِنَ التَّهْلِيلِ وَالتَّكْبِيرِ وَالتَّحْمِيدِ. Ibn al-Qayyim, Zād al-Maʿād fī Hadyi Khayr al-ʿIbād 2/360 ابن القيم، زاد المعاد في هدي خير العباد ٢/٣٦٠ https://shamela.ws/index.php/book/21713 @ilmtest [https://t.me/ilmtest]