וַיִּרְא֕וּ אֵ֖ת אֱלֹהֵ֣י יִשְׂרָאֵ֑ל וְתַ֣חַת רַגְלָ֗יו כְּמַעֲשֵׂה֙ לִבְנַ֣ת הַסַּפִּ֔יר וּכְעֶ֥צֶם הַשָּׁמַ֖יִם לָטֹֽהַר׃
Sie sahen die Herrlichkeit des Gottes Israels und darunter wie ein Werk aus leuchtendem Saphir, wie der reine Himmel an Klarheit.
Pirkei Avot
Ten miracles were wrought for our ancestors in Egypt, and ten at the sea. Ten plagues did the Holy one, blessed be He, bring upon the Egyptians in Egypt and ten at the sea. [With] ten trials did our ancestors try God, blessed be He, in the Wilderness, as it is said, “and they have tried Me these ten times and they have not listened to my voice” (Numbers 14:22).