Midrash sur Shabbat 21:4

26 (Numb. 14:27) “How long […]”: A legal teaching: When a baby has a stone in his hand on the Sabbath, is it permissible to pick him up [on the Sabbath]? Thus have our masters taught (in Shab. 21:1): A person may pick up one's child, even with a stone in his hand, or a basket (of fruit) with a stone inside it. You have learned from the generation of the wilderness that the Holy One, as it were, carried them up in the wilderness, (as in Deut. 1:31) “as one carries his child,” yet there was an object of idolatry in their hand.⁵⁰Corresponding to the stone in the hand of the child. Thus it is stated (in Neh. 9:18), “as they had made themselves a molten calf.” And so you find that, when they crossed in the sea, Micah's image (of Jud. 17:3–4) crossed with them, as stated (in Zech. 10:11), “And a rival wife⁵¹Tsarah. The Midrash understands the word in this sense, although most translations follow the other meaning of tsarah, i.e., “affliction,” “distress,” or the like. So also below, Deut. 4:14. shall cross in the sea.”⁵²Mekhilta deRabbi Ishmael, Pisha 14 on Exod. 12:41; Sanh. 103b; M. Pss. 101:2; Exod. R. 41:1; also Mekhilta deRabbi Ishmael, Wayassa‘ 1 on Exod. 15:22; ySuk. 4:3 (54c); see ARN, A, 34. Still with all this, the Holy One did not forsake them. He said to Moses, “I have done a lot of good things with them; yet they are provoking Me a lot. I parted the sea for them; they provoked Me,” as stated (in Pss. 78:40), “How often did they defy Him.” Here also they brought a bad name upon the land. I am not able to endure. How long shall I endure them? [Ergo] (in Numb. 14:27), “How long shall this evil congregation?”