Does the prayer become invalid by quickly saying the salutation to the right and left without ṭuma’nīnah (tranquility)?

If a worshiper says the tasleem quickly without ṭuma’nīnah (tranquility), whether by uttering it or by turning, their prayer is valid because ṭuma’nīnah is not obligatory in the tasleem. Some scholars have mentioned that it is prescribed for the Imam to hasten the tasleem out of concern for the validity of the congregants' prayer. Restricting oneself to a single tasleem is sufficient according to the majority of scholars, although it is better to perform two tasleems to avoid disagreement.