Chasidut for Pesachim 228:12
היכא דליכא אלא חסא מאי אמר רב הונא מברך מעיקרא אמרור ב"פ האדמה ואכיל ולבסוף מברך עליה על אכילת מרור ואכיל
R'Joseph said: Two kinds of meat are necessary, one in memory of the Passover-offering and the second in memory of the hagigah.<span class="x" onmousemove="('comment',' v. Mishnah supra 69b.');"><sup>17</sup></span> Rabina said: Even a bone and [its] broth. It is obvious that where other vegetables are present, he recites<span class="x" onmousemove="('comment',' At the first dipping.');"><sup>18</sup></span> the blessing, 'who createst the fruit of th ground' over the other vegetables and eats, and then<span class="x" onmousemove="('comment',' At the second dipping.');"><sup>19</sup></span> recites the blessing, '[Who hast commanded us] concerning the eating of bitter herbs,' and eats.<span class="x" onmousemove="('comment',' Each blessing being over a different vegetable.');"><sup>20</sup></span> But what if he has lettuce only? Said R'Huna: First he recites a blessing over the bitter herbs, 'Who createst the fruit of the ground,' and eats, and then [later] he recites over it 'concerning the eating of bitter herbs' and eats.
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.