And those who are firm on their testimonies,
Their testimony is truthful.
and standby their witnessing
And those who are upright in their testimonies
And those who, they are with their testimonies (they are) taking care of
… are trustworthy and truthful in their testimony
And those who are firm upon their testimonies
And those who are upright in their testimonies
And those who stand firm on their testimonies
And those who are upright in their evidences (and bear true testimony)
And those who stand firm in their testimonies