תּלמוד אויף תהילים 118:24

From where do we derive the rule as regards Hallel? Rabbah said: Because it is written, “From the rising of the sun until the going down” (Psalms 113:3). R. Joseph said: “This is the day which the Lord has made” (Psalms 118:24). R. Avia said:

Gemara. From where do we know this? Because the verse says, “And these days shall be mentioned and kept” (Esther 9:28). For reading the Hallel: As it is written, “From the rising of the sun to its going down” (Psalms 113:3). R. Joseph says: Because it is written, “This is the day which the Lord has made” (Psalms 118:24). For the taking of the lulav: As it is written, “And you shall take for yourself on the first day” (Leviticus 23:40).