Midrasch zu Tehillim 118:1

Conversely, Leah spoke words of praise, and her offspring continued the tradition of praise. She declared: This time will I praise the Lord (Gen. 29:35); and of her son Judah it is said: Judah, thee thy brethren praise (ibid. 49:8). David (another descendant) said: Praise the Lord, for He is good (Ps. 118:1); and concerning Daniel it is said: Daniel kneeled upon his knees three times a day, and prayed, and praised (Dan. 6:11). R. Judah said: Silence is so very important that Rachel was privileged, because of her silence, to rear two additional tribes in Israel, Ephraim and Manasseh.