Chasidut for Pesachim 228:8
מאי שני תבשילין אמר רב הונא סילקא וארוזא רבא הוה מיהדר אסילקא וארוזא הואיל ונפיק מפומיה דרב הונא
For it was taught, R'Jose said: Though he has [already] dipped the lettuce [hazereth], it is a religious requirement to bring lettuce and haroseth and two dishes before him.<span class="x" onmousemove="('comment',' And Resh Lakish maintains that R. Jose's reason is because precepts require intention.');"><sup>11</sup></span> Yet still, whence [does this food]: perhaps R'Jose holds [that] precepts do not require intention and the reason that we require two dippings is that there may be a distinction [shown] for the children? - If so, what is the 'religious requirement? '<span class="x" onmousemove="('comment',' mizwah implies that it is an essential obligation.');"><sup>12</sup></span>
Kedushat Levi
Nachmanides adds that Rashi deduced this fact from verse 13 in which the women drawing water are described as לשאוב מים, “to draw water.” When it was Rivkah’s turn, the Torah merely describes her as “descending and filling her jug,” the word “to draw,” is not used in connection with her until she proceeds to draw water for the camels in verse 20.
Why did the waters not rise toward her when she drew water for Eliezer’s camels, a tedious labour? The sages in Pessachim 114 [discussing the need to dip both matzah and maror in charosset. Ed] claim that in order to secure this kind of assistance from heavenly sources, the act of חסד, loving kindness, must be performed intentionally as a good deed, i.e. the intent of the good deed must be to thereby carry out the wishes of the Creator. The first time when Rivkah filled the jug to satisfy her own needs, i.e. this was not an act intended to please the Lord, specifically. The water rose to assist her as she was a righteous person. The second time, when what she did was an act of kindness to others, an act that demonstrated that she wished not only to please the camels but also her Creator, G’d withheld His assistance in order for her to receive the whole reward for the effort expended in doing this kind deed.