'RChalafta ben Dosa, leader of Kfar Chananiah, says: [When] ten people are sitting [together] and engage in Torah study, the Divine Presence dwells among them, as it is stated: God stands in the Divine congregation.  And from where [do we know] even five? As it is stated: And He has founded His group upon the earth.  And from where [do we know] even three? As it is stated: In the midst of judges He shall judge.  And from where [do we know] even two? As it is stated: Then those who fear Hashem spoke to each other, and Hashem listened and heard, etc.  And from where [do we know] even one? As it is stated: Wherever I cause My Name to be mentioned I shall come to you and bless you.

'RElazar, leader of Bartosa, says: Give Him from His own, for you and your possessions are His. And similarly David says: For everything is from You, and from Your hand we have given to You.  Rabbi Yaakov says: One who is traveling upon the road while studying [a Torah lesson] and stops his study and exclaims: “How beautiful is this tree!” [or] “How beautiful is this furrow!,” Scripture considers it as if he bears guilt for his soul.