It states (2:25) א ֱלֹק ִים וַיֵּדַע יִשְׂרָאֵל בְּנֵי אֶת א ֱלֹק ִים וַיַּרְא, "Hashem saw Bnei Yisrael, and Hashem knew." The Shach (al haTorah, from the students of the Arizal) teaches, "I heard that there is a Midrash that says, 'What did Hashem see? He saw that they had compassion for one another. If one person finished his quota for the day, he would go over to another person who hadn't yet finished his quota, and he would help him finish his work. When Hashem saw this, He said that they deserve that I have compassion on them. For there is a rule: Whoever has compassion on others, he receives compassion from Above. As it states (Devarim 13:18) ָוְרִחַמְך רַחֲמ ִים ָלְך וְנָתַן, and the Gemara (Shabbos 151b) explains, מרחמין הבריות על המרחם כל עליו מרחמין אין הבריות על מרחם שאינו וכל השמים מן עליו השמים מן , "Whoever has compassion on others, Heaven has compassion on him. Whoever doesn't have compassion for others, Heaven doesn't have compassion on him."
When Moshe asked Hashem what he should tell Bnei Yisrael when they ask for Hashem's name, Hashem replied (3:14) ה"אֶה ְ יֶ ה"אֶה ְ יֶ ֶׁראֲש . The Ramban on these words writes, "As you are with Me, that is how I will be with you. If they will open their hands and do tzedakah, I will also open My hand."
Moshe helped Tzipora with the sheep, as it states (2:17) צֹאנָם אֶת ְוַיַּשְׁק וַיּוֹשִׁעָן ֶׁהמֹש וַיָּקָם, "Moshe arose and rescued them and watered their flocks." Later, Tzipora helped Moshe Rabbeinu, ultimately saving his life, as it states (4:24-26) הֲמ ִיתוֹ ׁוַיְבַק ֵּש 'ה ׁ ֵ הוּוַיִּפ ְגְּש בַּמ ָּלוֹן ב ַדֶּרֶ ךְ וַיְהִי מִמ ֶּ נּוּ וַיִּרֶף ...לְר ַגְל ָיו וַת ַּגַּע ּבְּנָה ע ָרְלַת אֶת וַת ִּכְרֹת צֹר צִפ ֹּרָה וַתִּק ַּח, "Now he was on the way, in an inn, that Hashem met him and sought to put him to death. So, Tziporah took a sharp stone and severed her son's foreskin and cast it to his feet... Then He released him."
The Chofetz Chaim zt'l says that this teaches us that when one does good for others, in the end, goodness will be returned to him. He will receive his deserving reward. Moshe helped Tzipora, and then Tzipora helped him and saved his life.
It states (2:5) וְנַע ֲרֹת ֶיהָ ה ַיְאֹר עַל לִרְחֹץ פ ַּרְעֹה בַּת וַתֵּרֶד אֶת וַת ִּשְׁלַח הַס ּוּף בְּ תוֹךְ הַתֵּבָה אֶת וַתֵּרֶא ה ַיְאֹר יַד עַל הֹלְכֹת ָוַתִּקָּחֶה ּאֲמָתָה , "Pharaoh's daughter went down to bathe, to the Nile, and her maidens were walking along the Nile, and she saw the basket in the midst of the marsh, and she sent her maidservant, and she took it." Rashi quotes the Gemara (Sotah 12b) that ּאֲמָתָה means arm. Her arm grew several amos long, and she was able to reach Moshe's basket. The Chofetz Chaim (ת"עה) writes, "Basya knew the length of her arm, and she knew that she wasn't able to reach the teivah with it. Nevertheless, she put out her arm to save him, and her arm grew long, and she was able to save him. This teaches us that one shouldn't say that he isn't able to help his fellow man. Even when, according to the rules of nature, it seems impossible for you to help others, nevertheless, don't stand distant and don’t lose hope. Do what you can to save your fellow man, and then the salvation will occur, possibly in a miraculous manner. All miracles occur in this manner. They begin with a hishtadlus according to the ways of nature and end in a miracle."
It states (2:14) ה ַדָּבָר נוֹדַע אָכֵן וַיֹּאמַר ֶׁהמֹש וַיִּירָא, "Moshe became frightened and said, 'Indeed, the matter has become known!'" On the words ֶׁהמֹש וַיִּירָא, Rashi writes, "He was worried because he saw that there were resha'im in Yisrael who speak slander. He said, 'Perhaps now they won't deserve to be saved.'"
We see from this how severe the aveirah of slander is. For this aveirah, Moshe feared that they wouldn't be worthy of salvation.