SHAFAQNA – The Grand Ayatollah Khamenei answered a question about repeating lyrics/poems in the form of songs.
Question: Is it allowed to repeat lyrics/poems in the form of songs and without music?
The Grand Ayatollah Khamenei: Qena is Haram even if it is not accompanied with musical instruments; and by Qena it means that movement of sound in the throat is somehow that it is suitable for inappropriate gatherings ; but there is no problem with just repeating lyrics/poems.
 The special feature of these gatherings is to lead away the human beings from God and morality and lead them towards immorality and sins
Source: Ajwebatul Istefta’at, Question 1149.