It is narrated from Sayyida Aisha (may Allah be pleased with her) that when the Noble Prophet (peace and blessings be upon him) saw rain, he would supplicate: «اللّٰہُمَّصَیِّبًانَافِعًا» … "O Allah! Send down beneficial rain." Shuraih (may Allah have mercy on him) says: I asked Sayyida Aisha (may Allah be pleased with her) that when the Noble Prophet (peace and blessings be upon him) entered the house, what would he begin with? She said: "With the miswak."
Hadith Referenceالفتح الربانی / كتاب الطهارة / 572
Hadith Gradingمحدثین:صحیح
Hadith Takhrij«اسناده صحيح علي شرط مسلم۔ أخرجه النسائي: 3/ 164، وأخرجه مسلم: 253 دون القسم الاول ، (انظر مسند أحمد ترقيم الرسالة: 24144 ترقیم بيت الأفكار الدولية: 24645»
Brief Explanation
Benefits: … Sleep, conversation, and the passage of some time cause a change in the mouth due to the vapors from the stomach; therefore, at such times, the use of the miswak (tooth-stick) is prescribed.