Avot de Rabbi Natan 31
אבות דרבי נתן‎
אִם הָיְתָה נְטִיעָה בְּתוֹךְ יָדָךְ וְיֹאמְרוּ לָּךְ "הֲרֵי לָךְ הַמָּשִׁיחַ", בּוֹא וּנְטַע אֶת הַנְטִיעָה וְאַחַר כָּךְ צֵא וְהַקְבִּילוֹ.
Rabbi Yohanan Ben Zakai used to say: "If you have a sapling in your hand and they tell you 'The Messiah is coming!' first plant the sapling and then go to greet him." [translation by Hazon]

Suggested Discussion Questions:

What values does planting the tree before going to greet the Messiah express?

How would you live your life differently if you understood "welcoming guests" to be a central religious obligation?

Time Period: Medieval (Geonim through the 16th Century)