Genesis 21:28 Kabbalah

וַיַּצֵּ֣ב אַבְרָהָ֗ם אֶת־שֶׁ֛בַע כִּבְשֹׂ֥ת הַצֹּ֖אן לְבַדְּהֶֽן׃

And Abraham set seven ewe-lambs of the flock by themselves.

Read kabbalistic (mystical) interpretation of Genesis 21:28: and classical mystical sources.