It is narrated from Hazrat Ka'b bin Ujrah (may Allah be pleased with him) that I heard the Noble Prophet (peace and blessings be upon him) say: When any one of you performs ablution and does it well, then leaves with the intention of prayer, he should not interlace his fingers with each other during that time, because he is considered to be in prayer.
Hadith Referenceمسند احمد / أول مسند الكوفيين / 18103
Hadith Gradingحکم دارالسلام:حديث حسن، وهذا إسناد ضعيف لاختلاف فيه، ولجهالة حال أبى ثمامة الحناط