Luke 5:31

They that are whole. [ο ι υ γ ι α ι ν ο ν τ ε ς]. Both Matthew and Mark use ijscuontev, the strong. This use of the verb in its primary sense, to be in sound health, is found in Luke 7:10; Luke 14:27; and once in John, 3 Ep. verse 2. For this meaning it is the regular word in medical writings. Paul uses it only in the metaphorical sense : sound doctrine, sound words, sound in faith, etc. See 1 Timothy 1:10; 1 Timothy 6:3; Titus 1:13, etc.