Should I keep my hand clasped, or place it on my knee, or move it upwards after moving my finger for the Tashahhud and the Imam says the taslim?

Scholars differed on the point at which the forefinger movement should cease. Some said it stops at "wa ashhadu anna Muhammadan 'abduhu wa rasuluh" (and I bear witness that Muhammad is His servant and Messenger), while others said it continues until the salam (salutation of peace). This is what Al-Dessouqi indicated in his commentary, explaining that the movement should be from the beginning of the tashahhud until "'abduhu wa rasuluh," and that the reason for moving it is to remind the worshiper of the states of prayer.