I have seen some Muslims wingle their finger once,some twice and some continuously during Prayers. What is the correct Sunnah way?

There are two types of Ahaadith regarding the continual and non-continual
movement of the finger in Tashahhud.

According to the Hanafi Madhab, the finger should not be continually moved.
(Footnote No.5 Abu Dawud vol.1 pg.149). The index finger should be extended
at 'Laa ilaaha' and retracted at 'illa llaah'. (Shaami vol.2 pg.218;
Pakistan)

According to the Shaaf'ee Madhab, the index finger should be extended at
extracted at 'illallaah' without it's continual movement. (Fiqhul Islaami
vol.2 pg.218)

According to the Maaliki Madhab, one should close his small finger and ring
finger and form a circle with his thum and middle finger. (Fiqhul Islaai Wa
Adillatuhu vol.2 pg.938). There is no mention whether the finger should be
extended and retracted as well as whether it should be moved continuously or
not.

and Allah Ta'ala Knows Best

Mufti Ebrahim Desai
FATWA DEPT.