Charles Ellicott Commentary Mark 4:34

"and without a parable spake he not unto them: but privately to his own disciples he expounded all things." — Mark 4:34 (ASV)

He expounded.—The word may be noted as the verb from which the noun “interpretation” in 2 Peter 1:20 is formed, and so takes its place in the coincidences of phraseology which connect that Epistle with this Gospel. (See Introduction.)