Sayyiduna Wa'il bin Hujr (may Allah be pleased with him) said: I saw the Messenger of Allah (peace and blessings be upon him) placing his right hand over his left on the wrist ( «رُسغ» reached and refers to the joint of the wrist).
Hadith Referenceسنن دارمي / من كتاب الصللاة / 1275
Hadith Takhrijاس حدیث کی سند صحیح ہے۔ دیکھئے: [نسائي 888] ، نیز اسی طرح یہ روایت [مسلم 401] اور [ابن ماجه 801] میں بھی موجود ہے۔ نیز دیکھئے: [ابن حبان 1805] ، [موارد الظمآن 447]
Brief Explanation
(Commentary on Hadith 1274)
From this hadith, it is understood that in the standing position (qiyam), one should place the right hand over the left in the same manner. In the narration of Nasa’i, the word “qabz” (grasping) is used, meaning he (sallallahu alayhi wa sallam) would grasp the left hand with the right hand.