The final agreement of a family to a marriage proposal brings a long and anxious journey to a joyful conclusion. When Abraham's messenger secures the full consent of Rebecca's family, his immediate reaction is one of overwhelming gratitude to heaven.
Recognizing that they have completely agreed to the match [ביאור שטיינזלץ], the messenger understands that God alone guided their hearts to fulfill the request. Consequently, he directs his profound thanks entirely to God, rather than expressing gratitude to Laban and Bethuel [ביאור יש״ר, אלשיך]. His physical reaction is not an ordinary kneel. Instead, he falls completely to the ground, spreading his hands and feet to his full length, overcome by immense joy and thankfulness [רד״ק, העמק דבר].
From this spontaneous act, a fundamental principle is derived: a person must thank God upon receiving good news [רש״י]. Commentators question why this specific moment serves as the source for this rule, rather than the messenger's earlier act of bowing by the well. One perspective explains that only at this stage is the good news truly complete. Previously, he had found Rebecca, but he remained uncertain whether she would actually agree to leave her home and follow him [מזרחי, שפתי חכמים]. Another approach notes that during the first instance, the messenger recited an explicit blessing, which could be interpreted as a personal, private act of extreme piety. In this later moment, the immediate act of bowing upon hearing the news, without any additional blessing, establishes a clear and universal standard for anyone who receives glad tidings [משכיל לדוד, שפתי חכמים, דברי דוד].
At this juncture, the messenger is specifically referred to by his title as Abraham's servant, a detail that carries significant meaning. Some commentators view this as a reflection of his successfully completed mission. Having accomplished his goal, he feels the full weight and honor of realizing his destiny as the servant of Abraham [רש ר הירש]. Conversely, other viewpoints suggest the title emphasizes his lowly social status and his internal fears. Because a servant is legally invalid to serve as an official agent for marriage, he worried that Rebecca's family might demand he formally marry her on Isaac's behalf right then and there. When he hears their willingness to simply send her with him without any further legal demands, he praises God that his status as a servant did not sabotage the mission [אדרת אליהו]. Furthermore, he is deeply thankful that a respected family would agree to send their honored daughter away with someone who is, ultimately, just a servant [אלשיך].