Exodus 38:8
7 He put the poles into the rings on the sides of the altar, with which to carry it. He made the altar hollow, out of boards. 8 He made the large basin of bronze and its pedestal of bronze from the mirrors of the women who served at the entrance of the tent of meeting. 9 Bezalel made the courtyard. For the south side the hangings of the courtyard were of fine twisted linen, 150 feet long,
Onkelos Exodus 38:8
7 He inserted the poles into the rings on the sides of the altar to carry it; he made it hollow, out of boards. 8 He made the bronze basin and its stand from the mirrors of the women who come to pray at the entrance to the Tent of Meeting. 9 Then he made the courtyard. The south side was a hundred cubits long and had curtains of finely twisted linen,
Notes and References
"... Maimonides, in his Guide of the Perplexed, praises our targumist over twenty times for his rationalistic removal of hundreds of metaphoric anthropomorphic portrayals of God. The rationalistic orientation of our targumist is also evident in his tendency to change scriptural words to inform us of the purpose or end of a particular action when the Bible is otherwise unclear. For example, it is difficult to understand what action the women were performing in Exodus 38:8 when they brought mirrors as they 'gathered' at the entrance of the Tent of Meeting. The targumist explains that the women gathered 'to pray.' This explanation indicates that they gave priority to prayer over personal appearance ..."
Drazin, Israel, and Stanley M. Wagner Onkelos on the Torah, Exodus: Understanding the Bible Text Gefen, 2006