Prior to Gen. 16, the Lord has been speaking to Abram ALONE! There is no record of Sarai’s involvement. However, is reason to believe that being childless was a concern to wife Sarai who reasoned that the Lord had prevented her from bearing children since she was barren−Gen. 16:1-2a.
a. Unlike Abram who chose to talk to the Lord about his predicament, Sarai took matters in her own hands−Gen. 16:2b.i. The Lord rejected Eliezer as Abram’s heir-designate and instead promised him an heir from his own body. Abram believed in the Lord−Gen. 15:4, 6.ii. Sarai’s formula was an affront to the Lord’s Promise as it sought to engineer a solution outside of the Promise! Herein is a camouflage of Satan’s attempts to derail the fulfilment of the Lord’s Word, something established in foundation in the account of Adam and the Woman. The Lord had commanded man thus−Gen. 2:16-17; 3:1, 4.iii. Through Sarai’s formula, Abram was invited to CHOOSE between standing on the Lord’s clear and unambiguous Promise/Word, which would of necessity require patient endurance AND standing on a human/worldly solution by siring a child with Hagar, which would have been immediate!iv. Sarai’s maidservant was an Egyptian thus a type of the world−Gen. 16:1.