Adam Clarke on Genesis 20:13

When God caused me to wander - Here the word אלהים Elohim is used with a plural verb, (התעו hithu, caused me to wander), which is not very usual in the Hebrew language, as this plural noun is generally joined with verbs in the singular number. Because there is a departure from the general mode in this instance, some have contended that the word Elohim signifies princes in this place, and suppose it to refer to those in Chaldea, who expelled Abraham because he would not worship the fire; but the best critics, and with them the Jews, allow that Elohim here signifies the true God. Abraham probably refers to his first call.