ציטירנדיקער פּירוש אויף בראשית 16:4

וישב בין קדש ובין שור, the Torah did not bother to tell us precisely where Avraham settled. Later on, we are told that he settled in Gerar, the capital of the land of the Philistines. The part of the verse mentioning this fact is not related to the earlier part of the verse. Besides, the terms וישב and ויגר are totally different from one another, the former speaking of someone settling down with a view to remaining there for a long period, whereas the term ויגר always reflects the intention of the person described to remain there only for a relatively brief period of time, as for instance in Genesis 37,1 where when Yaakov settled down, the Torah contrasts this with the fact that his father and grandfather could not settle down there permanently but had only sojourned there,מגורי אביו. It is customary for Scripture to employ different words when repeating basically the same message. Perhaps, initially, Avraham had settled in one of the locations in the regions such as באר לחי רואי, subsequently moving to Gerar, seeing that באר לחי רואי was situated between Kadesh and Shur, as we know from Genesis 16,4.

ויצר, a word derived from the same root as Numbers 25,17 צרור את המדינים, “harass the Midianites.” The construction is not unlike that of the word ותקל in Genesis 16,4 which describes Hagar’s attitude to her mistress after she had become pregnant by Avraham. The word there is derived from the root קלל.

ויאמר ... הנך הרה, the angel used these words as an introduction, seeing he was well aware that Hagar knew that she was pregnant as the Torah had reported in verse 4, as well as Hagar's reaction. The message that angel had come to deliver was וילדת בן, "you will give birth to a son." The word יולדת is a composite composed from the word וילדת, which is a verb in the past tense converted into the future tense by the letter ו at the front, the other component being the word ויולדת, the same root as a present participle. The meaning of the combined composite is that seeing that the birth was something that had not yet occurred, the verb must contain an allusion to the future, whereas seeing that Hagar knew that she was pregnant, i.e. that the process which would result in a birth had already begun, the formulation of the verb had to reflect this fact also. The angel's message was: "just as you are aware that you are pregnant you should be equally aware that you will bear a son as a result of this pregnancy." There are some grammarians who believe that the root of the word here is similar to a four-lettered verb.