Psalms 95:11 Kabbalah

אֲשֶׁר־נִשְׁבַּ֥עְתִּי בְאַפִּ֑י אִם־יְ֝בֹא֗וּן אֶל־מְנוּחָתִֽי׃

Wherefore I swore in My wrath, That they should not enter into My arest.'

Read kabbalistic (mystical) interpretation of Psalms 95:11: and classical mystical sources.