Sayyiduna Anas bin Malik (may Allah be pleased with him) narrates that Sayyidah Umm Sulaym (may Allah be pleased with her) came to the service of the Messenger of Allah (peace and blessings be upon him) and said, "O Messenger of Allah (peace and blessings be upon him), teach me some words that I may recite as supplication in my prayer." He (peace and blessings be upon him) said: "Recite «‏‏‏‏سُبْحَانَ اللَٰه» ‏‏‏‏ ten times, «‏‏‏‏الحَمْدُ لِلَٰه» ‏‏‏‏ ten times, and «‏‏‏‏اللهُ أَكْبَرُ» ‏‏‏‏ ten times, then ask for your need and requirement, and He will say: Yes, yes (your supplication and request is accepted)."