NET
13 “Their throats are open graves, they deceive with their tongues, the poison of asps is under their lips.”
Darby
13 their throat is an open sepulchre; with their tongues they have used deceit; asps' poison [is] under their lips:
KJV
13 Their throat [is] an open sepulchre; with their tongues they have used deceit; the poison of asps [is] under their lips: