NO HIDDEN TRUTH

The Blessed One addressed Ananda in behalf of the order, saying: “What, then, Ananda, does the order expect of me? I have preached the truth without making any distinction between doctrine hidden or revealed; for in respect of the truth, Ananda, the Tathagata has no such thing as the closed fist of a teacher, who keeps some things back.

BUDDHA, THE GOSPEL By Paul Carus
Chicago, The Open Court Publishing Company,[1894]
https://www.sacred-texts.com/bud/btg/btg94.htm