HEB 1:5

5 For to which of the malachim did Hashem ever say, BENI ATAH, ANI HAYOM YELIDTICHA [(My Son you are; today I have become your Father)]? And again, ANI EH'H'YEH LO L'AV V'HU YIHEYEH LI L'BEN [(I will be to Him a Father and He will be to Me as a Son)]?