It is narrated from Hazrat Mustawrid bin Shaddad (may Allah be pleased with him) that I saw the Prophet (peace and blessings of Allah be upon him) that when he performed ablution, he would do khilal (interlacing) of his fingers starting from the little finger.
Hadith Referenceمسند احمد / مسند الشاميين / 18010
Hadith Gradingحکم دارالسلام:صحيح لغيره، ابن لهيعة سيئ الحفظ، لكن رواه عنه غير واحد ممن حدث عنه قديماً، ورواية هؤلاء عنه صالحة