Vocalizing the Intention in Fasting and Acts of Worship

Question:
His other question says: What is the ruling on vocalizing the intention in fasting and in acts of worship in general?

Answer:
This is a bid'ah (religious innovation). It is not permissible to vocalize the intention in all acts of worship, because the intention is an act of the heart, not an act of the tongue. That is one aspect.
The second aspect is that Allah knows your intention even if you do not vocalize it, and He does not . He said that, Glorified and Exalted is He, to those who said, "We believe." So Allah said, . Intentions are in the hearts, so it is not permissible to vocalize them. However, you sometimes vocalize the specific act of worship you intend, such as the sacrificial animal for 'Id al-Adha or the pilgrimage. You say, "O Allah, this is an udhiyah (sacrifice)," or "O Allah, this is a pilgrimage." This has been reported. Likewise, when entering ihram (the consecrated state of pilgrimage) and intending Hajj or 'Umrah, you vocalize it, saying for example, "Labbaik Hajjan" (Here I am for Hajj) or "Labbaik 'Umran" (Here I am for 'Umrah). There is no harm in that. Yes.