In what circumstances is it prescribed to raise the index finger?

Question:
Does a person raise the index finger with every dhikr, whether in prayer or otherwise, or only during du'a'?

Answer:
It is recommended to raise the index finger during the tashahhud, from the moment one sits down until the taslim in the final tashahhud. Likewise, in the first tashahhud, one points with the index finger to indicate tawhid (the oneness of Allah). During du'a', one moves it slightly at: "O Allah, send blessings upon Muhammad," and at "I seek refuge in Allah from the punishment of the Fire," and at the du'a': "O Allah, help me to remember You." During du'a', one moves it slightly, as the Prophet (peace and blessings be upon him) did.
Q: What is the authenticity of a person raising the index finger and looking at the sky after completing wudu'?
A: It is recommended to say after completing wudu': "I bear witness that there is no god but Allah alone, with no partner, and I bear witness that Muhammad is His slave and His Messenger. O Allah, make me among those who repent, and make me among those who purify themselves. Glory be to You, O Allah, and praise be to You. I bear witness that there is no god but You. I seek Your forgiveness, O Allah, and I repent to You." If one points with the index finger, there is nothing wrong with it. There is a hadith regarding this that contains weakness, concerning pointing with the index finger... If one points with it to indicate tawhid (the oneness of Allah), there is no blame.